> ~300MB is perfectly acceptable if it works well, looks good and does what it should do.

No it isn't. It isn't a word process for gods sake. It has one literally one job and 300 MB is like an order of magnitude off for that. This mentalty is the slippery slope that led us to the situation in the OP today.

You're off by 2 orders of magnitude if you think that a not completely incompetently coded weather app genuinely needs that kind of resources - even allowing for aesthetic choices and modern UX patterns.

Dunno. Many designers are pretty bad at UX. They’re OK at aesthetics, but that’s not the same thing.

Ah yes, Microsoft is famous for good modern UI/UX.