WebP Encoding Options - unclear example

[gl-bars]

https://imagemagick.org/script/webp.php uses -quality 50 with lossless. But if I understand correctly, -quality corresponds to "compression rate" in this case?

https://github.com/webmproject/libwebp/blob/main/doc/tools.md

quality parameter will in this case control the amount of processing time spent trying to make the output file as small as possible

It might make sense to give two examples (for lossy and lossless) and clarify -quality parameter for lossless case.
Also, 50 seems a bit low, maybe it should be a higher value or max value (99?).