Wait, what? The Mac App Store updates your apps automatically in background (I know bc sometimes it tells me it can’t update a particular app until I exit it)
that's the part I find annoying. Contrast to iOS which doesn't have this problem. Obviously the model on iOS is a lot different (more restrictive backgrounding, apps are build to handle shutdown at any time), but its still a minor frustration I have with MAS.
You see a download bar on app icons in the Dock and Finder while they are updating, then a badge (blue dot prefix before the name) on recently updated apps.
Rarely (i.e. on new user accounts) it may ask you for the iCloud account (if it was a purchased app, I think) or administrator password (after some major OS installations).
How is that frustrating and "making you worry" about updating?
It seems like you haven't used the Mac App Store or have changed the default to manual updates.
Obviously the model here is different, but its still a minor frustration to me.
Because that's how you end up with software that isn't updated, running old insecure versions.
As a user, I like it when my apps automatically update without me having to worry about it. The frustrating part about the Mac App Store is how it still makes you worry about updating apps.