This video collects all glitches and defects which can even happen to revised models. That video shouldn't prevent you from buying a switch early. I was an early adopter for the 3DS, Vita, PSP, PS2, PS3, PS4 and had revised (slim) models for all of them. My experience is, that the first released (classic) models are more robust (well, except the XBOX 360). While I had to send in my PSP slim&light, Vita Slim, New3DS and repair the laser of the PS2 slim by myself; the PSP Fat lady, PS Vita, Nintendo 3DS and the PS2 Fat are working just fine to this day. I wish I had the money to buy a Switch right now.