[leeoniya]

> (the standard example is "IE6 table layout quirks")

if a new browser in 2019 could not properly render an archived 1996 Geocities webpage at time of launch, i don't think many users would care or even notice. there are almost certainly legacy bugs in Firefox that have been open for over a decade with little activity and yet it's in production.

[Manishearth]

It's not just old sites that depend on these quirks.

Seriously, web compat is very tricky.