As a player, I have no interest in running around with a stack of DMPCs. As a DM, I have no interest in managing a stack of DMPCs that the PCs have recruited. A (single) temporary tagalong is fine and not at all uncommon, but our playstyle -- and I suspect a fair percentage of folks' -- generally does not involve the party having a bunch of groupies constantly in tow, for both narrative and logistical reasons.
In Labyrinth Lord and other hardcore old school games, you really need to have those henchmen along on most adventures; without them you're very unlikely to survive. Player normally runs them in combat, the logistics are pretty trivial when a stat block is Ftr 1 AC 4 hp 5 dam 1d8.
My Pathfinder BB group does not use henchmen though, even though they are available as 'grogs'.