Mannahnin
Scion of Murgen (He/Him)
Eh. I like to have it as an option. Even if 95% of campaigns will end before then, sometimes the stars will align and the right group will want it.Companion+ is one of the big mistakes of D&D publishing history: even to this day, the top level of Expert is where most games wrap up. Basic-Expert is the full range of normal D&D.
And you can also include optional and expanded content for lower levels in such a set. As with Jonathan Becker (Running Beagle Games)'s B/X Companion, for example.