That type of thing is actually pretty common for fully offline equipment. Think things like CNC machines that get all their instruction files via USB. Nobody is replacing a quarter-million dollar machine just because the OS is old.

But, yeah, if you connect such a thing to the internet, ooooh boy.

The dude is 38 and never got off his ass. How long are you going to enable this? They already did for two decades.

His parents are almost certainly 65+ and cannot afford to support themselves and a leech.