The premise is wrong anyway.  Pleroma was meant to be more lightweight than Mastodon so it could run on lower end hardware and for this to be achieved there's always going to be give and take.  FSE was a hw issue and SPC was running a very customised version of the sw.  Mastodon also pulls in a huge amount of money in donations whereas Pleroma doesn't so the sw hasn't been maintained as well as one would like.  Akkoma is the trans fork of pleroma because the dev team weren't woke enough and might be even more poorly maintained (I assume because the devs keep killing themselves).