Both Canonical and Ubuntu have their own share of problems, and they've been struggling to monetize Ubuntu for the past few years. Once you get burned by one commercial vendor (not once actually… it's the third time afaik), it's probably wise to use this opportunity for migrating to a more stable distribution where commercial interest doesn't have much influence, and which has never intentionally burned its users (since Debian developers are users too and are also doing it for themselves).
Heh. Saw the edit, but responding anyway. Canonical has its own issues. I can overlook some, others (like forcing Snap on users) have put me off a lot.
Ubuntu did a lot to popularize Linux and make the Linux desktop experience more usable. It struggled for a long time to figure out how to monetize that, though. They seem to be profitable now[1] claiming a growth in revenue to $205.4m and operating profit of $44m with a headcount of 858 (up from 705 the prior year).
The "Ubuntu Pro" move this year (which also raised many hackles, briefly) will probably pad the coffers a bit more.