All of it is true, but before going multiple APs, you should make sure you really need it - you would need to manage multiple networks and getting the APs to work together and allow devices to roam seamlessly might be a pain.

This is where the mesh units might come in handy - they are managed and configured in a single place, and can work together nicely - but of course you have to set them up with wire backhaul instead of in the "mesh mode".