Bitwig Studio

I still think Rent-to-Own via Splice is a better deal for new users (two years upgrade with no additional cost/interest) but if you already have a copy this is a good way to renew your upgrade license.

For those who don't know, unlike Reason for example, which has a subscription model where access is lost upon cancelling, Bitwig offers one year of all upgrades after purchase but you never lose access to the software and upgrades licenses can be purchased whenever a new update tempts you. If you feel like the current version you have is enough there's no need for additional payment. People would even buy it on sale and wait to activate however I cannot confirm this is still possible.

In a world of ever numerous subscriptions I appreciate the more fair approach to long-term monetization.

Also, despite my bitwig love as far as I know FL Studio still offers updates indefinitely after a one time purchase, which I have to respect, but innovation is worth regularly investing in my eyes.