There's still a fair amount of work that needs done, e.g. the Dev channel, which is less stable than beta, just got spell checking integration. Installing in Windows 7 [it'll be updated where ie won't] gives you 2 taskbar icons -- just unpin the 2nd. It does not remove the Internet Explorer icon or app. Note the gear icon towards the upper right of the new browser window -- that lets you set the theme, e.g. Informational is the same thing as the default in the old Edge. Both the Edge beta & the general release available today give you two choices for media autoplay -- allow & limit. Open the new Edge browser, enter "edge://flags/#edge-autoplay-user-setting-block-option" [w/out quotes] in the address bar, press Enter, then set the top item, "Show block option in autoplay settings", to Enabled. Then back in the browser's settings you can set media autoplay to blocked.

winaero[.]com/blog/edge-removes-the-block-option-from-media-autoplay-blocking/

microsoft[.]com/en-us/edge

It wasn't available through Windows Update when I tried, but was at the above linked site. The web page has some glitches -- I originally tried the very same page, reaching it from a link on Neowin, and the download dialog was *I think* in Russian.

The download is for a downloader that will download & install the app. While it shows various Windows versions available on the above site, the win7 download for example was identical to that for win10. I had enabled the local policy to allow the old & new Edge browsers to coexist side by side. I also had the new Edge beta already installed. The beta did not update to the full version, either using Help -> About or using the downloader -- the new version installed alongside the beta, so I had to manually uninstall the beta via Settings. The old Edge icon on the taskbar went away, and it's now listed as Microsoft Edge Legacy in the start menu. When running the old Edge does not have an icon on the taskbar -- just an empty block. Many, but not all settings were imported from the old Edge.