I'm not sunshowers, but I think the point isn't the exact number or a way of measuring it. For example, the reason I prefer to write Rust over C++ is not that I have measured it to be 2.6X faster for me to work with. My interpretation of what sunshowers was saying was more like "'technically better' can be enough, depending on much better it is, and I think Jujutsu is a big enough improvement [for me] that it's worth it".