They're either grossly inept, or knew damned well what they were doing.
NB, these options are not mutually exclusive.
Do you really think that today's GPUs, which can render incredibly-detailed 3D scenes in video games 60-100 times per second, REALLY have trouble with a simple Gradient Fill that's been written by Microsoft?
(Speaking for myself, I was a die-hard Firefox user for years, but switched to Chrome when Firefox's memory leaks kept getting worse and worse... with Chrome, I can "kill" a resource-hogging tab without killing my whole browser. I know what Google "charges" for Chrome (privacy) and it's a price I'm willing to pay.)
Exactly my experience, but with the addition of the Firefox devs basically telling me my memory leak problems were me "browsing it wrong".
Ah yes, because the North Koreans have a history of being so honest and forthright?
Moreso than the americunts.
Who could travel, faster than light.
She went out one day,
In a relative way,
And returned the previous night.