Using Bridge to "cull" your shots in the beginning spares LR from having to process them unnecessarily. Less writing and deleting activity on your drive, less chance to cause LR to corrupt a catalog.

I find Bridge to be a more convenient first step in sorting/weeding files before adding them to a permanent LR catalog.
It's also the only way I will deal with files provided by clients for post production.

If you have networking of some sort (wifi or wired ethernet) you can use Apple's Migration Assistant found in your Utility Folder.
If you don't have networking you can connect the two Macs directly using an Ethernet Cable.
There are Youtube tutorials but Apple has a Support document specifically for this.
If you have applications on your old computer that are not supported by the new operating system, they will still be "migrated" but their icons will have X's.
Migration Assistant will give you the option of transferring documents, applications, or only one category of files.
Apple has made moving to a newer computer painless.
Enjoy your new iMac!
https://support.apple.com/en-us/HT204350

Hybrid DSLR and Mirrorless.

https://photographylife.com/nikon-d850-hybrid-viewfinder

I've used Data Rescue to recover data on HDDs and flash media. It's not free.

I have found that some web pages can claim more memory resources than others which will slow down your computer. I use a Mac and have a utility called "Activity Monitor" which I keep open to tell me how much memory each application and window is consuming. High on the list at this time is this very page (UHH) weighing in at 539MB. I have 32GB of RAM so I don't really notice right now, but one web site that keeps track of local gasoline prices will balloon past 5GB if I leave it open too long. When I notice an application or window getting out of hand, I close it and reopen it which reduces the memory use. Some times the memory hogging of a single page can cause auxiliary fans to come on in the computer. When I close the offending window, the fan shuts off.

Two respondents mentioned hooking up their portable gas powered generator to their service panel.
Could we have some details, for instance, did the electrician connect the generator to serve the entire house or just one or two circuits?

No one has mentioned that the f stop number is actually a ratio of the lens focal length to the diameter of the lens opening or aperture.
The area of the aperture is "π x r squared" (pi times the radius squared). If you want to double the amount of light reaching the film plane allowing the shutter speed to be halved, you would have to increase the radius by a factor of "square root of 2" or 1.4.

If the insurance company "totals" the car due to flooding, it is reflected on the title. These still make it to auction but that's not to say they will end up being sold to unsuspecting buyers as drivable. There are plenty of parts on a car that can withstand flooding such as body parts, tires. Even a swamped engine can be dismantled and put back into service. The only real problem in a flooded car is anything electrical.

If the owner has no insurance, they are free to dry the car out and sell it. Buyer be ware.

The adjustable Diopter works for me on every camera I have tried including the A6500. It's just the disruptive nature of removing glasses in order to take a picture and replacing them in order to see normally. If all I were doing was taking pictures through the view finder that would be fine. But usually I'm walking about "viewing" the surroundings which requires glasses to be worn.

I'm looking at a SONY A6500.

How well do EVF do in bright sunlight for users with glasses? Does the gap caused by the glasses allow light to overpower the EVF, especially with sunlight coming from over the shoulder?

Why would a sensor that is capable of delivering a RAW file have to have a native White Balance?
White Balance is something that you apply to the RAW file (either in camera or in post production).
It is an editing down of the RAW file to match what we know about the illumination environment.

What you might find more to your liking is Adobe Bridge, which is a Browser. I use Bridge often to look at a mass of files given to me by a client. I simply drop the folder onto the Bridge icon and Bridge extracts previews, meta data. You can open the file directly from Bridge, rename, move, delete. The big difference between Bridge and Lightroom is that Lightroom retains previews, meta data in its catalog even when the original files are not mounted. Bridge needs to have direct access of the files, although it uses a cache to keep from having to regenerate previews.

Looking at your copy stand, I notice that the lights travel with the camera platform. This causes the exposure to change as you raise or lower the camera. Better to have the lights fixed in relation to the copy and you won't be changing camera setting. Auto-exposure can be a problem with copy work as the meter can be "fooled" into under or overexposing based on subject matter.