What really gets me is using web technologies in operating systems. Press the Windows key in Windows 11, and watch the start menu crawl & flicker up the screen. It should be rendered natively & buttery smooth. But no.
I'm not sure if the use of web technologies in the start menu is the cause of this. I thought it had to do with their search indexing or the lack of it so it winds up crawling a bunch of unindexed folders every time you open the menu.