My NES had the same problems as everyone else, blowing on cartridges and shyt, however, the fukking thing still works to this very day.
SNES still works like brand new. N64 been dropped a bunch of times and still powers through like its nothing, however, the analogue stick stopped working in one specific angle so I low key swapped it with my cousins friends joint.
Never had a problem with my ps1 or ps3, but the laser in my ps2 stopped working at some point but I think it was still useable as a DVD player, but I might be wrong it was so long ago.
my wii stopped working recently but only on some games, weird as hell, but its all good cause wii u backwards compatibility.