DoorLoop vs AppFolio for Small vs Large Portfolio - Where's the Line?

I keep seeing DoorLoop recommended for smaller portfolios and AppFolio for larger ones, but I don't know where that cutoff really is. I'm at around 50 units now and growing. Has anyone used both? At what point did you switch, or did you stick with one and why?

Does DoorLoop hold up as you scale, or do you eventually hit a wall? And is AppFolio really worth the premium if you're not managing thousands of units?