The problem would be if/for/when working on an already finished item, such as a pair of purchased boots, trying to make morphs or something.
I was playing around with the uvmap [potentially to one day try making some options] and when I hit the ‘abort’ button, instead of everything reverting to “as it imported”, it MOVED the uvmap islands over quite a bit.
The boots were the ones that came in the recent PC jeans/shirt/shoes/boot set for both Genesis 1 and 2 females. I was working with the pair for G1. Was using the uv smoothing tool on the uvmap. Hitting abort, it shouldn’t have done all what it did!