DAT (Well DDS) used to fill that niche. Used to be pretty reasonably priced - for tape. Went for a few hundred a drive, an order of magnitude less than LTO. Sma

DAT (Well DDS) used to fill that niche. Used to be pretty reasonably priced - for tape. Went for a few hundred a drive, an order of magnitude less than LTO. Smaller capacity each generation though, but is an older standard. Disappeared for no apparent reason about a decade or so ago.