It also lost much of its quality advantage over plain jpeg, given the improvements in jpeg encoders: the jpegli encoder (from google's jpegxl team) has improved plain jpeg encoding significantly.

Most photo/design apps don't seem to be using SOTA jpeg encoders, though, so I think webp looks better in comparisons like OP's than it actually is. You maintain all the ultra-fast decoding of jpg when you use a modern encoder, too.