You have zero clue.
EntreID is a SAML/ODIC IdP. You have to run something like Keycloak or purchase Okta.
Apple doesn’t offer true MDM, only tracking and disabling. JAMF, the premire apple MDM has absolutely nothing on InTune.
SharePoint is a disaster, but far less so than SMB, and it’s usually a lack of process more than the tech. But out of the box you have RBAC sharing and access controls with data labeling and scanning every single email and document for PII leakage and prevent it from being savrd much less sent.
You are clearly a non practitioner and completely ignorant with zero experience with MSP services.
I personally have a custom block on my setup, but I’m hardly average and use a qnap nas for my Linux service needs.
But to answer your question, yes basically most do. The average user walks into a best buy or Walmart and buys something in their price range. An even smaller percent will head to Dell or iBuyPower and buy a “low, mid, high” range of pre-builts and make few if any real customization.
They will do no research into GPU/CPU other than nivida vs AMD vs intel choices. They have no idea other than some very basic performance numbers eg I have 32G or ram and would give you a funny look if you asked them about vram.