Once WebP starts to get used more and more and people will stumble on issues with *.webp files they have no idea what to do with, their OSes and tools that they

Once WebP starts to get used more and more and people will stumble on issues with *.webp files they have no idea what to do with, their OSes and tools that they use will start to handle WebP files and the users will eventually learn what it is the same way they learned what JPEG is in the past. I don't know where the line of "too much progress" is, but you need to start that feedback loop somewhere.