Microsoft also exposed all of that HTML/JS engine as COM or whatever component, so it could be used by applications other than browser.
I remember using Microsoft Money -- personal accounting software -- and it seemed to be all built on that HTML/JS engine.
By investing in cross-platform IE and making it both the best browser and the universal runtime for desktop-quality apps, they could have had “Windows Everywhere”.
Instead they did the exact opposite and folded IE into a component of desktop Windows where it received no meaningful investment and lost its once commanding lead. Microsoft’s exclusive focus on their proprietary non-portable APIs was a great blunder.
But IMO it makes it all the more surprising that Microsoft doubled down on the centralized OS+API+apps leverage combo that had brought upon them the antitrust scrutiny, instead of dispersing their influence?