It's a moot point. If you are buying the whole system new then you buy M-capable drives. If you are stuck with G7 drives - then you don't format your tapes to

It's a moot point. If you are buying the whole system new then you buy M-capable drives. If you are stuck with G7 drives - then you don't format your tapes to M, even if you have 1 G7M drive. And if you value your data, ie you want to able to recover it someday then you need N+1 drives of needed generation and format anyway.