There's a huge gap between ie6 and what's happening now. I don't think anyone arguing for slowing down what's been happening for the last (let's say) 10 years is talking about the stupidity of ie6. Ie10 has been out for 12 years now!
> Cutting funding essentially returns us to the IE6 monoculture with no progress.
1. It doesn't return us to monoculture - Monoculture of ie6 gave us multiple browsers, which recently all merged into Chrome. We already have a monoculture which will now lose funding.
2. We're not losing any of that progress. Actual documented standards exist now, all players implement the same basics, and you can create most websites without browser specific quirks. That's not going away.
3. We've had so much progress that Electron is its own massive OS now. We could do with a bit less progress and a bit more "how do we make this mess maintainable".