All jetbrains products have a licence witch grants you the right to use the tools you buy forever(Without updates). If you buy a tool in 2019 you get a licence for 2019.1 and updates for a year. So if you never update you only have to pay once.
Except you only get the version that was released at the beginning of the cycle. In other words, when your subscription is over, you have to downgrade to a version that's a year old. Bugs and all.
With most software, this would not really be a huge deal. Photoshop? Who cares. Excel? Meh.
But with Jetbrains products you've got to consider whether the old version is going to be 100% compatible with your existing project files, plugins, keybindings, settings and configurations.
