this is not correct… (i run a number of other discourse forums)
default for ’ edit history visible to public" is true - always has been, and still is in 2.4
if you search in the admin panel you’ll see its been overriden, check the logs and you can see which mod/admin turned it off.
the principle behind it bring on, is you cannot change history (*)
(bare in mind, those with email notifications will see the edit anyway, so it can get a little confusing)
that said, i’m not saying its desirable to keep view edit history on.
on one server Ive also turned it off, as it caused trouble. e.g. someone replies, then later thinks better of it… so decides to edit it to ‘tone it down a bit’, but there often is ‘someone’ who will check the edit, and respond to what was previously said in the post.
so I take it on a server by server basis, if all play fair/nicely, then i leave it turned on - as its quite useful, and i think promotes ‘responsibility’ … but if i see nastiness, then i turn it off.
(*) note: if you edit/delete within the edit window (5 mins by default?) , then these are not shown at all… they are not deemed ‘done’ till edit window elapses.