Lots of CPTS – any drawbacks?

I’m new to the plug in and trying to learn as much as I can before setting up the site structure etc.

The CPT add on looks really useful. Before I go crazy and create dozens of different CPTs, I wanted to check if creating too many can cause problems.

In particular I see that the CPTs appear on the map on the demo site which makes it useful for filtering etc. I can imagine the map would start to look cluttered if there were, say, 20 different CPTs to choose from. Would you agree?