Lanczos is sinc - any sinc implementation needs to be windowed in some way since a real sinc function goes on for infinite time/space, Lanczos is just one option for windowing that has a lot of positive aspects - Lanczos resampling - Wikipedia
In general, “lanczos operating on linear data” is USUALLY best. Gamma error in picture scaling for more on the whole linear data thing, although according to some sources, I believe Adobe intentionally does scaling on nonlinear data because while it fails in some corner cases, it was perceptually found to be better in human subject testing. (My source for that is “I remember Jim Kasson mentioning it in passing on dpreview ages ago” so that may not be very accurate…)
This happens a lot. I’ve seen people claim that Gerard Undone has claimed that Sony users with 8-bit cameras should shoot S-Log2 and not S-Log3 - but it’s not too difficult to mathematically show that S-Log3 should NEVER be combined with 8-bit video… Fortunately for Gerard, people have claimed that he said it but I can’t find a case where he actually said it, so I’ll give him the benefit of the doubt and assume those people misinterpreted what he said (probably when talking about a Sony that did 10-bit video…)