Hi ,
I am much like you,
70s 80s musician that got back into it in the early 2000s, Mostly keyboards. I had a Yamaha C1 computer with voyetra software if that ages me, so be it.
I like Studio One as it works well once you get into it. It runs like a tape deck unlike a few other daws out there. Ableton is cool, but I do not think in loops, so I put that one to bed.
Two midi things to know. Studio One ignores sysex. Mostly a problem if you are trying to send data to outboard gear like patch data, or memory dumps. Lately I have noticed that multiple midi channels seem to have been dropped from the same track. Simple fix, copy to another track, change the channel, and call it good. It could be me as the upgrade to Version 4 was pretty intense.
No matter what you choose, things have changed
. It has been a great learning experience catching up so to speak. It is great to have synths you owned or wished to own at your disposal as well as not shelling out studio time for demos.
Barry