It's been a while since I've posted in the thread, hopefully everyone is doing fine!
The way I've been using my devices hasn't changed too much, at this point, I've had my Mac Mini for close to 6 months now. And my gaming PC, while in need of new parts, is still around. I've been on my Mac Mini more than my iPad more due to ergonomics but in general, I would say I often have long periods of time where I use them both equally.
My iPad is still my favorite device, but it's definitely more my document viewer and markup device when needed. I take full advantage of hand off between the Mac and iPad to scan things or take pictures onto the Mac. I still use the iPad to write down my feelings and notes for subjects to bring up to my therapist. It's also a means to show things to other people without bringing them to my desktops, like pictures I've taken. I still sometimes read manga and comics with my iPad as well. Once the weather app comes to the iPad, it'll be a nice weather report screen too. I also doodle on my iPad for fun and mental well being.
Yea, my opinion hasn't changed that much, the iPad and Mac compliment each other while being able to do what the other can to varying levels of success. Your needs will change how possible it is to use only one device as your one and only personal computer though.