I mostly play gen 7 OU and have like ~200 teams. Sometimes some teams would be similar or fall under one category so putting them in a folder would be a great idea. However, it would be really hard because I have to go find the team, copy it, paste it into one of the folders, and then go back and delete it. Other times I want to move a team from one folder to another and I would have to do the same (copy>paste>delete old one) which wouldn't be a big deal but if I want to make a folder for something, say, "Stall" or "Hyper Offense" I would have to do that for like 20+ teams and it would take way too long.
