Only if those "advancements" make it back into Debian.

Why? It's great either way. If improvements to Ubuntu help get people into linux, and they choose to stay on Ubuntu rather than move to Debian, how is that not a win?

A win for who?

My name is not RMS, I do not eat my own toe jam and have a superiority complex that compels me to dictate to others what they should do.

I couldn't care less if someone else uses Linux. I care about Debian being a stable and secure OS for the servers I manage.

Are Canonical's code changes not open source? Backporting those changes is not necessarily their responsibility.

What is Debian missing and why is it Ubuntu's fault that it isn't in Debian?