I've been thinking about getting one since they first came out because while I enjoy the tracker workflow, I don't enjoy making music at the computer these days, especially since working from home during the pandemic.
Like you though, I worry about the channel limit. While 8 channels would be plenty for sequencing monophonic parts, as soon as you start throwing chords in there, or even just mono parts where you want the notes to overlap and decay naturally, 8 channels seems a drastic limitation. The hardware in there must surely be able to handle 32 channels? An internal battery would also have been a useful feature.