yeah. where is it saving the screenshots?
This depends on your system, but on a Mac running Mojave they currently end up under [username]/Library/Application Support/Default, where Library is a hidden directory.
This is not ideal, I'll admit, but given the game's age we aren't likely to improve the save location anytime soon.
Any idea where they go in Windows 10?
Sorry for the long delay responding! Had to gain access to an old test machine.
I believe you'll find them under: C:\Users\[username]\AppData\LocalLow\Crafted Reveries Limited\Shu_s Garden
Assuming C: is where Windows is installed.
Also, BTW the reason it pauses for so long is that these are actually scaled up 8x. This feature was for internal screenshot-taking purposes and in retrospect should probably not have remained connected to a controller button...