I've only used AFORMs and here's some of the the drawbacks:

My UPT time shows up as a single number. There's no way to break out solo or dual time.

After you leave UPT, AFORMS makes no distinction between student time and non-student, and in fighters, I don't think it even differentiates between solo and dual.

I still think an airline likes seeing an AFORM product over a manual logbook since there's much less opportunity for fraud.