system
A chat on subreddit /r/pcmasterrace
human
Are OEM power supplies still bombs? For a while there they were actually putting in pretty good quality PSUs, if a bit under rated and with proprietary ports. 

For the longest time where were absolutely bombs though.
gpt
OEM PSUs from Dell, HP, other big name brands actually tend to be decent quality/not explosive. , although usually non modular and proprietary

Gamers nexus tested a few Alienware and found nothing wrong with the PSUs (except the proprietary thing).

It's the shitty builders that make "custom PCs" that choose what parts go in where you tend to find  the really shitty off brand PSUs that go boom.