One of those is a "subscribe until you don't want to pay for it, then the last major version that you subscribed too is yours to keep forever." That's not comp

One of those is a "subscribe until you don't want to pay for it, then the last major version that you subscribed too is yours to keep forever." That's not completely accurate. First of all, this only applies if you subscribe for at leas a year (e.g. a 1 month subscription is not enough to get a perpetual license). Secondly, you only get a perpetual license for the product available at the time of purchase or 12 months prior. So, e.g. if you buy a yearly subscription for CLion now, then you will get a perpetual license for 2020.2.z (the current version), but not for 2020.3.z. Of course, you can renew the license after a year and get perpetual licenses for newer releases as well. (Maybe this is what you were saying, but it doesn't read like that ;).) Another is "pay for the specific version once and be done with it, here's your license key." They don't have that model for their IDEs anymore, right? That said, I am also a happy user of JetBrains products, and especially their All Products Pack is really a good deal (if you frequently switch between languages).