Dave, I used Aperture from day one and I was very happy with it. It was groundbreaking when introduced. It is a far better DAM (digital asset management) program than LR ever will be, and I had plug-ins for Aperture for stitching, lens correction, special effects. Life was good.
Then the earthquake hit. Aperture announced the discontinuation of Aperture support. Apple no longer wanted the professional & pro-sumer photographers as customers.
Apple is not a software application company, they will occasionally write an application if they identify a solution that is unique and it is something not available but in the long run, they are a hardware company. Apple's track record is they invent something unique then allow software companies to take over when those companies offer competitive applications.
Photos target market is the iOS social media average Jane crowd. Soccer mom's sharing photos of little Jimmy with dad at work. Photos has the look and structure of iOS, it is intended to help sell iOS devices and it is not a functional replacement for Aperture. (I fear that managers at Apple have a misguided idea that if they make the Mac experience more like iOS, buy removing features and simplifying the software, then iOS users will buy more Macs.)
Photos may be useful in some way but it would be a great surprise if it had the professional features of Aperture. We don't really know because it's already been a year, and they're just getting around to a developers release. But per the article you sited, the developer release confirms everything I just said.
Adobe on the other hand extended a welcome to Aperture users and re-iterated their commitment to photoghraphers. Adobe followed up that commitment with an Aperture to LR migration tool. Seems like Adobe wants me as a customer.
As far as being intimidated, both learning LR and the ideas of migrating a library are seemingly big tasks. Let me address those two issues.
LR has a learning curve but it is more Aperture-like than any of the other programs that I have tested. The big difference is LR uses a referenced library, it is not as powerful at DAM as Aperture. So the user has to organize the image-library on the disk. I recommend you view "Up and Running With LR 5 by Jan Kabili". Open LR and do the exercises along with her. When your done with that, you will have a good understanding of how to get around in LR.
As far as the migration, who says you have to migrate? Most of those photos have already been edited right? So what's the point? You can start fresh using LR with new images, and keep using Aperture to print/share the old images, and migrate your old library to Photos when Aperture finally quits working (sometime in the future). Also you could keep you OS at the current state and Aperture will keep woking much longer. The possibilities are endless (to quote Apple), that is until Apple discontinues Photos in 10 years.
Just saying....