I think this also struck me as different and I didnāt really see it as a positive change.
Quoting an old forum post
you can see how compact it used to be, font and users and the thread in question all quite clear.
The newer version is much less compact, and instead of some sort of colour itās using bold instead.
It feels harder to look at, but maybe itāll be fine after getting used to it.
I also think this probably is a confusing presentation if a) you donāt know the āoldā way was called markdown b) you knew about markdown but didnt know that was a symbol being used for it (the M 
) and c) what the opposite of markdown should be and why it has the letter A.
Iām not sure how I feel about the wysiwyg editor, but I suppose I can give it a go here and there and see if it grows on me.
I think what can annoy me with wysiwyg editors is that sometimes they can end up doing non trivial things with html and break formatting. In other contexts Iāve seen them cause issues and youād have to swap to html or markdown mode to manually fix those problems.
Itās strangely annoying to delete a āhide detailsā object in wysiwig mode, where you have to select more than the drop-down itself and then maybe it deletes and not just the text inside it.
Those sorts of things I can imagine being somewhat annoying.