fair but “it” here is pretty vague. my guess is that, in your case, whatever part of “it” that processes the image handles webp files just fine but for some reason the devs made “it” reject file extensions that don’t match “.jpeg”, “.png”, “.whatever_else” for some reason before the file gets handled further.
yup, this is what I do and it works great. just be careful if you add plugins that store a ton of metadata that changes a lot (or logs) because that can lead to some sync conflicts and you might wanna exclude them. I’ve just been ignoring the sync conflicts tho and haven’t had issues yet so maybe you could do the same