For Luma: you are right about Jinc and NNEDI3 in my opinion but comparing Jinc to super-xbr is hard. Important only if you don't have the performance for NNEDI3. Some do like xbr more than NEEDI3 though so best is hard to say for sure. Lanczos is sharper than Jinc too.
SuperRes has diminishing returns with more passes, less benefit for the extra performance hit. As I understand linear light for SuperRes emphasizes erorr in small light details while gamma light emphasizes small dark details. There difference is fairly subtle in my experience.
For Chroma: I agree, madshi added SoftCubic for chroma and it was the default at first. A very reasonable choice for filmed content. I also agree that anime is different and sharper chroma scaling is more beneficial. People do like sharp though.
