This is probably an old debate but I wonder what folks are doing about ligatures aka Fira Code?
From here https://github.com/mickeynp/ligature.el There seems to be two options back port a fix to 27.1 or 27.2 or run emacs 28 via snapd?
The error I see is
Skipping rebuild of /home/daniel-lower/.emacs.d/.cache/quelpa/packages/ligature-20220213.1525.el
(Spacemacs) Error:
An error occurred while installing ligature (error: (error Package 'emacs-28' is unavailable))
@danielplower I started getting an error with Emacs 27.1 and the Spacemacs Unicode layer, with ligature-set-ligatures not found after the latest package update. Not sure how relevant that is to the error you posted.
I installed https://launchpad.net/~ubuntu-elisp/+archive/ubuntu/ppa and the problem seems to disappear though (as well as making Spacemacs extremely fast)
@jr0cket Thanks John I run a weird setup WSL with Ubuntu piping to Xming server for X at work at any rate. At home I can go more crazy with nightly builds as it's less mission critical. I am setting up for emacs 28 well like you've pointed out emacs 29 is already in the works so emacs 28 should get progressively more stable till it's officially released.