Plan: Unlimited (but not mobile; no longer offered.)
Country: UK
Device: HP Chromebook 11 G1 (daisy_spring)
Operating System: ChromeOS Version 72.0.3626.97 (Official Build) beta (32-bit)

My Question or Issue
Like many other Spotify clients that own a Chromebook and used to listen via the webplayer at open.spotify.com or any of the Chrome extensions or "apps" that package the aforementioned webpage, I have been unable to now for months and months. Browsing, creating playlists, and anything that doesn't involve actual audio still works. But press play and...

"An error occurred. Spotify no longer supports this version of Chrome. Please update your browser for uninterrupted listening."

I note with annoyance that Spotify has officially declared this issue fixed: https://community.spotify.com/t5/Ongoing-Issues/Spotify-says-I-need-to-update-chrome-but-there-aren-...

Similarly moderator @Guido says so here: https://community.spotify.com/t5/Ongoing-Issues/Spotify-says-I-need-to-update-chrome-but-there-aren-...
But look at the replies to this comment! Users like @PaulTran107, @MAD_SHEEPz, @ninclemdo, @daniocp and myself all comment that, actually no, it hasn't been fixed for all of us.

Moderator @Katerina recommends posting a new thread about it (a new thread for the same issue, but whatever), so so be it.

I will state that the latest version of the Chrome OS at time of writing is 79.0.xxxx, and therefore my Chromebook running version 72.0.xxxx actually is out of date. This is because chromebooks have a "Auto Update Expiration date" after which they will no longer update. Thus there is nothing I can do to update to a later version of Chrome OS, checking for updates returns a "Your Chromebook is up to date" message.
So if it is the case that Spotify has officially decided this is not an error but planned obsolescence on their part please state so. I would be extremely disappointed and argue that simply on the basis that it used to work it still can: the breaking change must have come from Spotify's end. But at least it would be an answer.

I'd also point out that - and other users have mentioned this too - sometimes audio plays for a second or two before stopping as the error message appears.

I dearly hope that there is some more communication regarding this issue - any questions please ask - and who knows, perhaps even a fix!

Thanks, W