[TeMPOraL]

Gamedev is a separate topic. As for designers, they are on the opposite side from users in the tug-of-war of control over content rendering. I don't believe they should get 100% of their way.

[mrec]

Gamedev falls squarely into my "smallish subset of use cases". It does legitimately need non-DOM UI, but it's not a huge part of the Web (yet).

As for designers, thank you for finding a much more diplomatic phrasing than the one I was about to write.