Advanced Cel Shader Pack

I know this is a tough question to answer in a general sense, but how resource-intensive is this? I’m working on a project that’s specced towards lower end PCs (think hardware that was new 4-6 years ago), and right now we have an exceptionally small GPU & CPU footprint. Is this something I could tweak and tailor to run performantly, or would I be taking a big hit just to enable it?

Edited to add: I also just noticed that the marketplace lists this as compatible with 4.9-4.11… are there any plans to add compatibility with 4.12?