If you dont use the default LongFast meshtastic is really empty. I switched my node to MediumSlow, since it’s like 86% faster than LongFast. I knew there would not be any in my area, so I subscribed to the msh/US MQTT topic and theres still nobody else. I’m going to leave it like that for a while and see if I hear anything during any kind of band openings or catch any other MQTT nodes trying out that topic. And yes, both uplink and downlink are enabled. I do know that there are some nodes in the Bay Area on msh/US/mqtt-bayme-sh, but I am not near their.
People have made BBS’s with it, like from the 1990s, and there are some very limited games you can play over the mesh, such as Mesh Tac Toe. Look up TC2 BBS and Specfive.