And since you won't be able to modify web pages, it will also mean the end of customization, either for looks (ie. DarkReader, Stylus), conveniance (ie. Tampermonkey) or accessibility.
I'm pretty sure google is more like many small fiefdoms fighting for money and prestige than a unified pack of moustache twirlers. Though there do seem to be a lot of "head up their own ass" engineers there, too, which leads to things like them having 15 different messaging apps and an inability to maintain projects long term.