Ask people off the street instead of HN developers who like to pretend their undesigned weekend project looks good just because it almost works, and you'll find consensus more common than you think. Or even better, how unanimous the consensus is on what looks like shit.

True, but there is a common definition of "outdated". Tk looks outdated.

Design is expensive and not always an important part of a desktop application which should "do the job".

If it's internal software, yes. If you're making it for a mass market, it's a super important part.

I'll take a slower, better looking Electron app over a faster, dated looking Tk app any day.

Function follows form, I see.

How about a dated looking Electron "app"?