i have gone back to desktop gaming. more comfortable to me haha
if you're careful, no (simply put, no damage to original parts, no warranty voided). tbh as long as you're careful and patient, nothing will go wrong. also, after the second time of disassembly, i think you can remember what to do in the right sequence to do a whole disassembly.
i also swapped almost everything that i could replace in my aws (took out stock parts and swapped ram, ssds, replacement hdd caddy for bdrom, wifi card, cpu heat sink, cpu, gpu, thermal paste, thermal pads; these stock parts are still like new today) when original parts (e.g. mobo, power jack, keyboard, power brick, display) had issues, dell techs came and helped me replace faulty parts only.
That's reassuring to know. I'm glad Dell is not some jackass company that won't honor factory defect under warranty because I re-pasted the heatsink.