Are they? They extended DNS, LDAP and Kerberos to make Active Directory so that now every Microsoft-locked corporation is stuck using Microsoft as their internal DNS. They do the various things they do to get everyone stuck using their email instead of any other standard IMAP/SMTP/webmail provider. Azure is "somehow" one of the three major cloud providers.

Arguably not, if they're still doing eee... Even vscode is just a shell again with most noteable extensions /language servers being proprietary again