Or, thanks to bsnes/higan/ares[0], SFC accuracy is solved, thus it should be much easier for any new emulator to be accurate.
i.e. accuracy should be the baseline; I understand Super ZSNES is not there yet.
Ares is a seriously underrated emulator. I don't use it much now that I have a MiSTer, but it is by far my favourite emulator on desktop.
Kind of?
Accuracy is valuable, but as illustrated by the early days of people using buggy emulators for SNES games on phones and the DS/3DS, people will tolerate buggy but running on their hardware over correct but unplayable.