Is this the value that decides how to look for the unique instance:
app/gimpcoreapp.h:#define GIMP_APPLICATION_ID "org.gimp.GIMP"
Because for the time being having both 2.10 and 3.0 running side by side is a very common occurrence, and -n isn’t a good solution (because I want to connect to either running version form a command prompt, as determined by the executable I launch).
Maybe it could be changed to "org.gimp.GIMP3" or be determines by some environment variable?
I can of course make a local mod, but that’s one more thing to think about