It took months for the NES mini software mod to be as reliable as it is now.
SNES one should hopefully be quicker given a lot of the work is already done (as it's the same board), but there are no doubt differences in the software that they'll have to work on.
Months? How difficult is it to hack the NES Classic now?
I'm not in a rush, can wait months for them to hack the SNES Classic properly.