This article is a really good and interesting read. Rare that I read something from top to bottom.
When I first started reading it brought me to mind of MiXplorer. Probably one of the best file managers out there. Along with its addons (or Silver version with addons baked in) makes it ideal as the core of a minimal ROM setup.
The fact that it is not open source would have the uninitiated making claims of not being trustworthy or the like. An argument made far too many times over the years for many apps.
But anyway, give it a read. Really nice and informative. No politics, just straight info (mostly).