I’ve used HE_Mesh, ToxicLibs and plain PShapes all in the same project because each has its strength. It’s not hard to convert meshes from one format to the other. I actually used the first two to generate meshes and then convert them to PShape as they are kept in the GPU.
Even if the mesh itself is static, you can translate, rotate and scale them, you can move the camera, and you can deform them with vertex shaders, which is very fast. That allows you to bend, twist, stretch, glitch and apply all kinds of manipulations to them in real time (the same kind of deformations you have in Blender).
Just my 0.01€ 