The word on the "European Fuji Street" is that this is, once again, "a cracking good" (UK expression !) all round camera, maintaining the reputation of the X-T line, with significant improvements, perhaps more for the X-T2 community (that's me !) than the X-T3 owners. But that's an individual decision.

https://jonasraskphotography.com/2020/02/26/fujifilm-x-t4-first-look-preview-closer-to-technical-bliss/

Erm ..... anyone interested in a SUPERB quality X-T2 ? I need only one camera.

Hello all, this is my first post so please excuse any foibles.
I am trying to make a decision regarding upgrading my equipment.
I currently have a Canon Rebel T3i that I bought with a couple of kit lenses (the 18-55 is pretty good). I have focused on buying good lenses that I could use now and would also be good for a future full frame camera and any upgraded crop sensor camera. I currently have an EF 100mm 2.8 IS USM, an EF 100-200mm 2.8 IS ll USM and an EF 24-105mm 1:4 IS USM. Of course there’s more on my wish list :)
I like to photograph birds, animals, insects, scenery, vacation memories, my grandson and want to explore more subjects.
I would like to get the Canon EOS 5D MKIV And have wanted to for a while. I’m looking at upgrading soon.
Now for my dilemma,
I’m seeing mirrorless cameras that seem to have most of the capabilities that I’m looking for. They are beginning to have adaptors that will fit my good glass. They are lighter and the cost is very comparable.
I’m concerned that if I get the 5DMKIV it will become obsolete technology.
I would like to hear some opinions and good information to help with my decision. I’m interested in any advice and things I might consider.
Thank you,
Marianne

If you check the initial pricing, the flagship 1-Series DSLRs debut around $6500, model after model after model, year after year after year. Here's a cut n paste of features. There's no reason to bold the significant differences as they are all cutting-edge for EOS DSLRs and DSLRs in general (skipping the 20MP sensor)

-New 20.1-megapixel sensor with new high-detail low-pass filter
-New DIGIC X processor
-ISO range of 50-102,400 (expandable to 50-819,200)
-191-point AF system (155 all cross-type) with Deep Learning Technology capable of tracking subject's head and face
-3,869 manual AF positions and 525 automatic areas with Live View Dual Pixel AF
-Reduced time lag and viewfinder blackout
-Smart Controller built into AF-On button for fast AF point selection
-Dual Pixel AF in Live View with 90% x 100% coverage and range of EV -6 to EV 18
-16 fps continuous shooting with optical viewfinder, 20 fps in Live View with mechanical or silent electronic shutter
-Dual CFexpress slots
-Buffer of 1,000 raw images or more
-12-bit 5.5K raw video internal recording
-10-bit 4:2:2 4K 60p using full width of sensor in Canon Log
-Improved network connectivity and functionality
-Button illumination
-Face-Priority E-TTL II metering
-10-bit HEIF file format for wider dynamic range, improved color representation, and smaller file size than 8-bit JPEG

Not listed is a 400,000 shutter life and the integrated, 2-battery grip. They're meant to be shot in all weather. I have the experience of dropping one onto cement from 4-feet with no issue and barely a scuff. They're built to last for everyday shooting in every situation. That 'network' connectivity is an RJ-45 internet port, just like a computer /server, so the camera connects to your network and the images can move through a workflow of a camera at the Olympic Ski Jump, images go directly to one or few editors, and directly onto the internet site within 90-seconds of each competitor's landing. The argument is 20MP is more than enough resolution for this level of professional image production, now at 20 images per second.

These are completely different cameras than what Sony puts out. Nikon's top model is more similar to Canon. When you consider organizations like Getty and what was formerly Sports Illustrated, when they arrive to the Olympics, the Super Bowl, the Final 4, the Indy 500, the World Cup, etc, with hundreds (to thousands) of these bodies and even more lenses, and all the networked IT infrastructure, you can see how changing technology or brand is a glacial pace as compared to individuals or small shops.