So why exactly are legacy controllers for SFV banned?

Other than the claim that there are dropped inputs, because I haven’t had a single one yet. Can somebody please explain this to me? I can’t really seem to find any factual reasoning for this.

Because the legacy system in place requires a dual shock 4 to be powered on for it to work. The only way to ensure that the dual shock will be charged is to keep it plugged in to one of the USB ports on the ps4. It’s really a logistical nightmare to keep all of those dual shocks charged. Since the ps4 only has two ports, it becomes a time killing juggling act between charging the dual shock and having two sticks plugged in.