> JetBrains' tools have to be rented.

That's not correct. JetBrains subscriptions come with a perpetual fallback license for the version available when you purchased the subscription. This is basically the same as the previous model where you would buy a license for a specific version with free upgrades for some period of time afterwards. Most people would continuously buy the upgrade license they wanted to stay on the latest version.

https://sales.jetbrains.com/hc/en-gb/articles/207240845-What...

This isn't accurate. When you now pay for a year long "subscription" you own that version and can use it indefinitely. Exactly like buying a version-license previously.