Yes, eventually, all of them will end up this way. But the attitude lacks nuance. I paid $120 for Plex 8 years ago, and if it becomes utter crap tomorrow, it's been totally worth it.
Don't think of any such thing as "lifetime". Just ask: "For the amount they are charging me, how long does it need to last for it to have been worth my money?" With the price I paid, one year would have been enough.
So of course, Plex is going to engage in the fuckery that they are. JellyFin on the other hand, for the amount it costs is surprisingly low on janky behavior.