I watch Ubuntu's recent steps with trepidation. I love using it for a home Linux machine (indeed upgrading just to LTS-es), and I could not care less about its "convergence" aspirations. I don't want Ubuntu on my phone or my tablet, or at least I don't care.
I worry that eventually its mobile plans will bury the desktop Ubuntu, move it out of focus, so to say. When that happens, I wonder whither I should turn. Debian?