The thing about Apple encouraging people to move to support “Liquid Glass” is, I suspect, not that the specifics of the look and feel are cemented forever but that the API changes are something they feel they can support across platforms, kits, and time.
Here’s Apple not even being able to keep their own ducks in a row:
https://daringfireball.net/2026/03/what_to_do_about_those_menu_item_icons_in_macos_26_tahoe
