we often see requests for individual drum real tracks. Loops are perfect for that task, and totally customizeable by the user. You could use MIDI to create the snippets as needed, then save the snippets as audio. This would allow the assembly of many different 1 beat, 2 beat, 3 beat, 4 beat etc kick drum loops, drum rolls, hi hats etc.

In fact many such loops already exist, some of them for free on the web

And you can also capture your drum snippets from existing songs.

etc. Use your imagination. The possibilities boggle the mind!