Is it just me or is the Ubuntu font really hard to read for long-form text? It doesn't help that it's larger than normal body text too. Sites like this remind me that custom fonts in CSS were a mistake.

On topic… calling switching to Linux an "upgrade" is pretty presumptuous. It's not an upgrade for someone whose business relies on programs or technologies which are still only available on Windows - for many of those people, that's probably why they're on Windows in the first place.