I have a Motorola B12, and it's been working pretty solidly for a year now. 

yes, which is especially funny considering you no longer have an option to turn them off, so how could this matter to anyone? It would be pretty evil if they waited until after Windows 10 EOL to renew the certs, but based on these dates, it looks like that wouldn't be possible, so no worries that I can see.

A Unifi Dream Machine Pro SE an option?  or a little too complex?

I think they needed to simplify their product lines, having such a range of devices is confusing at best, and yes, I think it's also worth dropping those old line names. So I think it's good for them in the long run, and I bet they found that in their research too. Ask a random consumer which of their products would have been the premium one, and unless they knew Dell products intimately, I doubt they would know. Though I think they could have simplified it further.. "Pro Max Plus", what the hell is going on there?!

NOT AT HOME!