Update: Canonical are now saying 32bit libraries will be "frozen" and not entirely dropped.
Things are starting to get messy, after Canonical announced the end of 32bit support from Ubuntu 19.10 onwards, Valve have now responded.
Speaking on Twitter, Valve dev Pierre-Loup Griffais said:
Ubuntu 19.10 and future releases will not be officially supported by Steam or recommended to our users. We will evaluate ways to minimize breakage for existing users, but will also switch our focus to a different distribution, currently TBD.
I'm starting to think we might see a sharp U-turn from Canonical, as this is something that would hit them quite hard. Either way, the damage has been done.
I can't say I am surprised by Valve's response here. Canonical pretty clearly didn't think it through enough on how it would affect the desktop. It certainly seems like Canonical also didn't speak to enough developers first.
Perhaps this will give Valve a renewed focus on SteamOS? Interestingly, Valve are now funding some work on KWin (part of KDE).
Looks like I shall be distro hopping very soon…
To journalists from other websites reading: This does not mean the end of Linux support, Ubuntu is just one distribution.