The reason why it works well for Autodesk and Adobe is the fact that they have a defacto monopoly in their fields. My boss doesn't like the fact that they have a subscription scheme but we have one for Adobe Cloud because there isn't another way. That is not the case for an IDE. I really like PyCharm and PHPStorm but I can (and also would) drop them in a heartbeat.

You will always find some (edge) case who can profit from these kind of schemes - an amateur photographer for example with Adobe CC or somebody who uses all the jetbrain tools - but there are a lot of cases that are a different and really don't have any benefits of using SAAS.

In Flanders we have a saying that goes a bit like this: "all small things makes on big thing". The personal problem that I have is that if I would add all those "inexpensive" subscriptions of services it will add up very fast to a point that it is becoming really expensive. I don't buy all software in a single month or can even wait for upgrading if an older version is good enough for me, with SAASS that is not the case.

But I have the same opinion that this race to convert all commercial software to SAAS will be beneficial for OSS alternatives. Personally I would even go as far as donating (or crowdfund) (for the same amount that I would give to jetbrains) to an OSS project, if that means that I would get an alternative that I don't need to "rent".