You are underestimating how workflows can differ from person to person. The way you work might not work too well in digitakt. For me, it works perfect. But I create everything in digitakt. I’m not importing tracks I created in a DAW into digitakt (yet). And if I would, I would not literally re-create the track as a whole into Digitakt but just re-create the feel/groove.
It also depends on what kind of music you create I guess. I create 1 groove inside the DT on 1 pattern, and build that into a track live, on the spot. I might use a second pattern for a break, and a third as a variation, but that’s it. That’s why I only need 1 project for a complete live set. I work hard live ;). I use 2 digitakts to be able to mix grooves into eachother.
Only a OT won’t work for what I want to do live. I’ll probably end up exchanging one digitakt for on OT down the line though, because the sample mangling is way more impressive and interesting indeed.