Edge was always usable, but you'll always get second-grade experience if apps switch to the "fallback mode" on your browser.
Google is playing this game of quickly introducing standards they're already implementing in Chrome, and choking out the competition. And it worked with Microsoft. Worked with Opera.
Safari and Firefox are increasingly on the same page and flat out refuse to implement Chrome's non-standards (see, e.g. https://webapicontroversy.com).
It's Safari and Firefox as the last competing browsers standing, and Firefox is increasingly irrelevant. Whatever your opinion of Safari is, soon it will be the only browser trying to resist Chrome. And judging by the amount of new "standards" Chrome ships enabled by default with each release, Google couldn't care less about Safari either.
Edge was always usable, but you'll always get second-grade experience if apps switch to the "fallback mode" on your browser.
Google is playing this game of quickly introducing standards they're already implementing in Chrome, and choking out the competition. And it worked with Microsoft. Worked with Opera.
Firefox is last man standing.