I’d say gimp itself works as expected so far - but it’s not in a context as heavy as in my work place…
The problems I have with Gimp don’t come from Gimp itself but from the fact it’s Gimp-as-a-Snap.
⋅ thumbnails,
⋅ /tmp folder ( damn, I did not test that point yet )
⋅ online help,
⋅ scanner,
⋅ fonts
⋅ removable devices in pane of gtk-file-chooser ( seems ok now ).
If of any interest : https://github.com/snapcrafters/gimp/issues/125 ‘cause I guess Gimp is not the only app’ that directly generates thumbnails for its files.
I’ve heard the safety concern. But users need thumbnails. Safety should not remove expected abilities.