We have been down this road before in 2000, so we know it leads to the total opposite of "make development simpler".
When IE6 became the engine mono culture, it was the best.
But then it stopped innovating, because it didn't need to. It also pushed moves that were only for the good of Micorosoft, since they had monopoly, trying to make the web a less open place.
It was a pain to develop for, a pain to debug, and a capricious master.
Google has shown they can be very naughty as soon as they got power over something.
