I remembered reading about it happening soon (?) for certain kinds of security updates (?) somewhere but it's almost 2am here and I'm having difficulty googling a reliable and thorough source but it sounds like users will have to subscribe to Ubuntu Pro to get certain kinds of update, although it might be free under certain circumstances.
I don't know, Ubuntu has treated me well the last decade but I'm willing to explore other distros if it seems like it'll be unnecessarily commericalized. Will read up more in the morning.