Etoliated plants may eventually die if they do not get enough light, but regarding semps and relatives, they will usually just get tall and stringy, then resume normal growth when given enough light. They will last a long time under cool/cold conditions, regardless of light intensity as long as not given a lot of water. You will end up with distorted plants without much color, but the offsets will be normal as long as done under proper light. That is why we recommend not trying to grow indoors, unless you have a greenhouse or something similar with a lot of light. Back before I became a collector, I had a bunch in strawberry jars that I just stuck in an unheated garage for the entire winter. No light, no water, no care. I would just stick the pots back outside in April or May when I thought to do it and they always did fine.
Another consideration is pushing growth under less than ideal situations can result in offset production before the proper season/conditions, so the offsets could be etoliated as well. Again, plants will survive and just have distorted growth.
Not a major worry, but just didn't want to see your beautiful plants distort and lose color.
