I typically record to 2ch stereo files (recorder writing 2, 3 or 4 of them for 4, 6 or 8 channels total) simply because I can listen directly to each pair in stereo via a software player without having to loading them into an editor. Sometimes if I want to avoid file splits I'll switch to recording mono files to double the record time before the auto-split, mostly just for easier file management at a fests where it's nice to have only a single file set for each act, and some of the acts might be doing 2hr+ sets.