Earlier quoted context omitted.
I don't think the IE comparison is apt. IE shipped on (almost) every machine, had a ton of lock in features like ActiveX, etc. MS actively abused their monopoly position to make it so preventing default installation of Netscape by OEMs, incentivising ISVs to ensure web based enterprise products shipped with "Works best in Internet Explorer" etc. Netscape lost market share to IE not because it lost users but because w…
Also: It was bad for Microsoft if browsers became too good as the Windows OS then could too easily be replaced by cheaper platforms. So Microsoft wanted to keep browsers back as much as possible. It's good for Google when Chrome is good. So Google has a great incitament to improve Chrome. The only drawbacks would be proprietary functionality others can't use.
And what proprietary functionality is that? Chromium exists and does all the same things.