WebP exists since 2010 and has an industry-standard for pictures on the web. Yet Adobe doesn't seem to bother. I cannot export them neither in LR nor PS. Yes, there are plugins for PS, but I do my bulk-exports for eventphotos in LR and have no need for PS for sports pictures (for example).
Programs like ACDSee support the webp-format, I still need to convert them after exporting. Pls Adobe implement that format in LR so I don't have to convert hundreds of pictures every time I exported them from LR.