@LiveLatios Considering it's most likely the nail polish remover, I don't think you'll get it fixed under warranty.
So there is nothing holding you back from installing a replacement shell. I've seen some cool ones online.
I would do it sooner rather than later, the acetone might still be eating away at the insides of the Switch and who knows how long before it stops working completely.
I give it about a 50/50 chance that some of the acetone got inside. It won't harm metal I believe, but it could be eating away at any plastic components on the board, or worse, the battery.
It might be a good idea to take the guts out of it ASAP, look for acetone residue and give it a good cleaning with some rubbing alcohol (or maybe contact cleaner?) to get any residue off. Chuck the damaged shell in the bin and wait for your replacement shell to arrive. Best not give the acetone a chance to eat away at the internals if there's any residue left. If you're lucky, then none of the acetone actually got inside the shell, but since it even managed to get underneath the stand it could have gotten inside as well.
The seal between Switch and a flat surface is not air tight, even without the joy cons attached (which provide plenty of extra breathing room). It doesn't block enough of the airflow to make Switch overheat, so the exact percentage is irrelevant. A number of videos have done testing on this, and to actually get it to overheat you have to double wrap it in towels.
It might not overheat, but the heat might still be bad for the battery.
I guess everyone has their reasons but this feature is useless to me. How long is the boot time for the switch? It shouldn't be that long.
I don't use sleep mode a lot but it does come in handy. If the Switch is completely off you can't power it on with the controller even when it's docked, it needs to maintain at least some sort of low power state in order to read the controller inputs.
And if you're in the middle of a game, you need to stop playing and don't have time to go to a save point sleep mode is a lifesaver.