You make a good point, I just hate it. I feel like there’s a lot of examples where this is more relevant but admit I’m struggling for examples (TXT, log, inf, etc) by really it’s only video files bay have quite different content of structure despite the same extension - this is why everyone uses VLC because it handles everything you throw at it

Another is not underlining the keyboard indicators.

These were both on by default in the early releases of windows (far as i remember) and some bunch of smooth brains decided to remove meaningful information from the interface. It should be clear and detailed in a user interface, not implied