OK, I'm a bit confused at the moment. I was ware that Ubuntu is selling subscriptions. I was aware that some security updates required subscription plans; BUT I was under the impression this was for extended support (i.e. after 5 years for a LTS version) or maybe for less frequently used packages beyond what the core distribution ships with.

Now, i get a pop up that looks like the regular update screen, but lists updates I cannot install. So, essentially a sales pitch for Pro. This sounds like exactly the reason, why I'm no longer on Windows.

Can I securely run Ubuntu Desktop and Server, current LTS, without paying?