The Mac App Store was released in January 2011 and it marked the beginning of a great new distribution channel. Even though it lacked some bells and whistles, the developer community was hopeful the problems would be addressed in due course. Unfortunately, it has been years and there’s no evidence that the core issues would be addressed in the future, at all.
I bought Affinity Designer recently because I was able to use the beta releases, which proved the app to be stable, performant, and very functional. I don’t buy Mac apps without being able to try them.