I'm against subscriptions generally, but $50/yr is significantly cheaper than the $299 for Final Cut Pro X or whatever it is they offered previously.
I used to work on a competing product, and subscription pricing will work better for most people who are in this market, so my personal use case is an outlier I know.
Edit: all that said, I’m excited to be the first person to subscribe to Logic on the iPad. I hope that subscription is Family Sharing enabled as well!
I know Adobe has “proven” pros will take subscription software and like it, but for every day users who like to mess around now and then, I have no interest in a perpetual subscription.