I wasn’t able to make much in POPs just because it was a bit difficult to navigate the samples, but I did manage to create a physics simulator using verlet integration. I think it would be really awesome to be able to search for attributes that a POP has, and it directs you to the node that created that attribute.
Aside from that, using the nodes like Trail and POP would constantly crash my Touchdesigner (understandably) but I think it would be cool to have maybe a default limit for the proximity node of how many points actually get connected and then you could adjust the that limit. Like perhaps maximum of 100 points connected when you first connect the pop and the rest are just left untouched.