No, no. You forgot about this:

The announcement post also warns that the vibe-coded Preview is currently “light on features”

So a slightly faster launcher that is light on features!

Restoring from the system tray will save you 0.06seconds!!! How can Valve compete with that.!.

Oh yeah, by being a decent platform for buying games.

Now, DNS is largely used for this purpose.

Um, that does not really make sense.

-mail.microsoft.com -ftp.microsoft.com -irc.microsoft.com -print.microsoft.com

These are all domain names and DNS servers are used to resolve these to different IPs. Always has done that job and still does it today. But microsoft.com is a single domain name and DNS can only resolve it to a single address (or set of addresses). So cannot be used to tell different services apart.

DNS does not know anything about http or https or any other protocal like that. It just resolves the domain name to an IP/set of IPs. The only thing it can do is point www.microsoft.com and microsoft.com to the same location so that you can use either to get to the webservers.