
dolphin_oracle "I read this as more of him lamenting … a problem he thinks … the linux ecosystem has …" - exactly, it's one of his favorite soapbox talking points, MXPI being just the chosen example for another article.
…
dreamer "Until we have universal Linux packaging that can match Windows packaging" - or better (not impossible), but that's quite a challenge. So many tails want to wag the dog, and insert layers of "platform/DE/..." disruption.
As several here have noted, there may be room for improvement of MXPI, the MX Package Installer.
(switching to pedantic hat)
The challenge of UI is to inform (and sometimes educate) the user - the more accurately and completely, the better.
For example, when using terminal as root, it helps to change the terminal appearance, as a reminder.
In using MXPI (or any package/app "store"), perhaps switching to Testing should likewise start with a notice (perhaps a longer first-time version congratulating the user on their Bold and Fearless choice, a note that the MX TEST repo is activated Temporarily, and offering a link to Feedback Guidelines?), and involve at least a change in appearance that gently but firmly reminds the user of the difference - without greatly reducing readability, of course.
(Nobody said this would be conveniently easy.)