One of the maintainers (and possibly the founder) of mbin, a fork of kbin, which is a fediverse platform that combines lemmy and microblog while lookin' gr8. The fork is actually maintained and has actual versions and changelogs while kbin has 3 other very great features and extremely sporadic maintainership (kbin.social, their flagship instance, is currently down as we speak.).
I think we should fail --purge if no config file is specified on the command line. I see no world where an invocation without one would make sense, and it would have caught the problem here.
—poettering
They removed installing another package that did this by default in the same version where they introduced the App Center. Ubuntu Software never handled installing third-party debs, gdebi did. And in the version where they introduced the App Center, they stopped bundling gdebi by default.
Also, the old behavior was that you double click on a deb file and App Center just hangs. This was shipped in the LTS.