Earlier quoted context omitted.
Ah, you are correct. I thought a renewal was only required for a new major version after 3 years. But it's actually any update after 3 years. Which is still pretty reasonable (but not quite such a good deal)!
I also thought that it was perpetual. Maybe they changed it. Either way, the three-year subscription is news to me.
And tbh, Sublime Text is pretty stable and the kind of program you could probably get away without updating for some time if you wanted to. Things like LSP support are in 3rd party packages (that are open source, not subject to the license), so you'd get updates for those anyway.