Thing with the Octatrack that trips most people up is the structure, once you understand that it has many ways of working, you only need to focus on the way(s) which suit you.
For example capturing loops couldn’t be any simpler once you understand how it works, and those loops can be the exact length you specify, the start and end of the recording can be quantised, then you can quickly save them, or edit them. But it does take a certain amount of time to learn the basics, although this is often exaggerated as being difficult, which it isn’t, you just need to concentrate and understand what settings you need to make. It’s flexibility dictates that you need to tell it which inputs to record from, to which buffer, and for how long and when, and if you want the recording process automated or manual or via midi. In the case of recording multiple loops quickly once you set up these parameters it can be very fast.