https://github.com/banesullivan started pyvista as a grad student (IIRC) before he ended up working at kitware.
I've used PyVista extensively for making figures for papers and other projects, but at times one must delve into the lower level VTK api to do things not at all or well exposed at the level of the PyVista API. Overall its a good project and I hope it continues to improve and expand access to powerful stuff in VTK minus the segfaults I occasionally run into when attempting to do so from python...