I have only gone full-linux for two years now. Before that I was on Mac for 10 years and before that Windows. I have had various machines that ran either Ubuntu or Debian that were not my main machine, but mostly backup or file servers.
I am generally happy with Ubuntu, although sometimes I feel like a more bleeding edge distro could be nice when I am looking for more up to date packages with the latest features. It is somewhat annoying having to go beyond the main package manager to install these newer packages, because installation instructions are not always available. E.g., a make file is available but there are no instructions on dependencies. At this point I am not/no longer looking to switch distels.
Why did you go from Arch to Manjaro?