I could be remembering wrong, but didn't later versions of stuffit compress to a .sit file that had no resource fork, so it would stay fully-intact on any filesystem? I may be imagining that, but I remember hitting a certain version where "copying to Windows" would no longer ruin my .sit files... haha
I don't remember there ever being a resource fork, but I Think around v4 it started allowing you to drag-n-drop any file to decompress, ignoring the missing/required finder info from previous versions
It's been a long time, but I don't think that's exactly true. The resource fork simply became optional, assisted by later versions of MacOS, which let applications open files which didn't have one.
Ahh hmm OK, I'll have to check into this some time. I feel like the filesize would stay the same (suggesting no loss of data), but it's totally possible I'm misremembering considering how long it has been, hahah :)