One of the best cases for building a versatile tool, is accessibility to less privileged populations, for example people who can’t efford to have a reliable Internet because of their shady ISPs, they need a browser that renders web content as fast as possible, and also because they can’t afford to download apps due to slow internet speeds, Flatpaks could take gigabyte of HDD space and you have to update them later, which is painful in other parts of the world
Even if the user had a reliable Internet and solid hardware, maybe they’re a security minded individual, and want to keep their app installs to a minimum. To them many apps are considered bloat and that’s dangerous.
I think the difficulty lies in wisely choosing what features to include, before your users start asking : hey, do we really need that ? Or : who uses that ?