[brynedwards]

One I know is Bitwig who recently changed their licensing model so you get 12 months updates with your perpetual license and can pay to continue receiving updates after 12 months[1].

[1] https://www.bitwig.com/en/17/new-license-model.html

[rainbowmverse]

Reaper gives you years of updates for your $60.

[pspeter3]

That seems like a good hybrid model

[toyg]

It's the old JetBrains model.