I dislike the examples here where the "old" way works in all browsers, but the "new" way only works in Chrome/Edge. IMO, it's irresponsible to include such examples, since it makes the Blink monoculture worse.
Agreed; wish the default filter was "newly available" since that includes all 3 major browsers (Chrome/Edge, Safari, Firefox) but still includes new stuff that isn't "baseline" yet.