We have deep appreciation for all Operating Systems, but our choice to stay Windows-only was made based on three practical constraints:
We are a CUDA-accelerated engine, and Apple (Mac OS) dropped support for Nvidia/CUDA.
Linux is really powerful and flexible, but most engineers and designers doing productviz work on non-Linux systems.
Supporting multiple platforms slows down development/testing tremendously, and we are strongly focused on supporting just one platform, but doing it right.