And if you have the memory all 8 track recorders can record while the 8 tracks playback
Also remember the arranger does not necessarily have to be “just press play” as it can be set to infinite loop, so for example each row can have your pattern, mutes, BPM, offset, length, and scene all set, then you can manually move to each row in an improvised way, you can jump around to each row in any order you want, and you can even set remarks to label each row to make remembering what is where, it is very flexible, and does not have to just play in a linear and automatic way.