Not only the subscription model, but also their forced cloud. But I guess that they will continue on the track which they are on, subscription is a guarantied way to get money from customers. Looks at Adobe before and after subscription.
But it's not only the subscription, I also do not like the UI changes, so when 1P6 stops working I'll be getting something else.
Good news for you is that 1P6 won't ever stop working, especially if you have it standalone. The only thing that will stop it is when MacOS completely abandons Rosetta 2 support for Intel binaries. When that version of MacOS comes out, the last of the Intel Macs will be stuck on that last version of MacOS, then for anything new that is needed, they'll need a hardware upgrade.
That's why I went ahead and cut my losses this past April and migrated to Silicon from my 2011 MBA.
BL.