If you know what endpoint (intune), modern authentication (app registrations), CA, Entra, Purview, Sentinel etc are it would make sense.
Physical infrastructure is even slowing becoming obsolete. Pretty soon a couple of switches and a router is all that most sites will need. You don’t need phones or servers, maybe just a few printers.
Run whatever OS you want, on whatever device, from wherever you like and it can all be centrally managed including app deployment, SSO to the applications you want with remediation of software failures or security issues.
Its pretty powerful stuff.