I'm about as big a Firefox fanboy as they come, but... I don't understand the problem here? The Chrome devs are thinking about whether a <toast> element would

I'm about as big a Firefox fanboy as they come, but... I don't understand the problem here? The Chrome devs are thinking about whether a <toast> element would be useful. They float the proposal early on, and announce that they will implement (not ship! Web developers cannot use it) it to get some real-world experience with that to inform its design. Still plenty of time for people to get involved, make objections, allow refinement, etc. Or am I missing something?