Fedora (with Plasma) and I don’t plan on moving to another distro until something tangible happens. Switching my distro based on hypothetical situations would keep me from ever staying on any distro for very long.
That being said if I had to use another distro, I feel like I’d try out Debian stable, while using Flatpaks and Distrobox to get up-to-date software. That feels like it would be a good approximation of the excellent middleground that Fedora has.
If you want to be nitpicky about it, you could consider it to not be an “ad” because its not a company paying to put that text there. It’s Ubuntu promoting their own product. But I don’t think it makes much of a difference in this case, since it’s a big annoyance either way.