Ask HN: Why does Edge Chromium use pkg installer instead of dmg?

extracting the pkg

MicrosoftEdgeBeta-84.0.522.11.pkg Office16_all_autoupdate.pkg

where MicrosoftEdgeBeta-84.0.522.11.pkg extracts to just .app, although there are a couple of embedded .apps, used according to the names for rendering and GPU

Office16_all_autoupdate.pkg seems to be the updater, however it seems that the updater is optional and can be chosen to not install in the installer but appears to default to install.

if its anything like google chrome it installs an updater application that is a royal pain to try and remove