I may be switching to a job that requires daily travel in the next month or so.
Will definitely have to pick up an OP-1, again.
Regarding its functionality with composition, it's all about using it mostly by itself. Sure you can sample other sources, and I am partial to Patterning on iPad to make more interesting drum programs than OP-1's drum sequencer is capable of, but the compositional power is in using the tape to record/splice/arrange, and most importantly PERFORM. It takes some practice, but once you figure out the arrow commands for moving around the play head / changing loop length, and combine that with mutes, solos, FX slot tweaks, etc, the composition becomes a product of the tape feature as an instrument itself.
Yes it is limiting. And yes that is the point. Instruments are limiting. You push those limits with how you play them.