> I deemed this "I hate WebP" just a comment bait argument in social networks.
Go try adding a webp image to a Google doc and then reconsider your position.
Lacking support for WebP or for other common media is a flaw of a specific service.
Many websites accept videos only in mp4 + h264 + aac audio for some reason, while there are many other video formats and codecs which could be used on the web and in general. That doesn't mean the other formats or codecs are worse or annoying.
You have now seen evidence of poor webp compatibility. It exists. The people you said were making it up to bait you into commenting were probably being sincere. That's the entire point of the comment. The end.
I was curious because I use WebP pretty extensively for many years, and haven't seen any issues with it.
I don't consider web services to be a software. It's no news that many services don't support wide variety of formats, it's their decision. Missing WebP support is a minor inconvenience compared to other missing features of web services.
The article is about self-hosted website as far as I understand, so it doesn't matter what the external services support or not.