I actually recently bought that last ever Airport Extreme with Time Capsule and wow, I'm pleased with it for the price I paid on ebay. Plus now I have backups of my personal and work computers! The only issue I've noticed is that you can't set discrete DHCP settings for your personal vs. guest networks, so my guests have to manually set their DNS since they can't reach my pi-hole that's on my personal wifi. But that's pretty acceptable since I don't want people to get too comfy on my guest network.

I would really love to see Airport come back with a 1-3 year old A-series chip, kind of like what they did with the HomePod. Except without all the AI/always-on microphone crap.