In practice the impact on me as an end-user is that if I want to use the WebP for anything I have to rename it to PNG, because programmers were not sufficiently careful about backwards-compatibility as to make the experience seamless. This is, from my perspective, an undesirable outcome and a significant inconvenience. The four things listed sound like they wouldn’t impact my experience except in terms of speed, so I’m tentatively unopposed, but I’m suspicious that it would be WebP all over again.
In practice the impact on me as an end-user is that if I want to use the WebP for anything I have to rename it to PNG, because programmers were not sufficiently careful about backwards-compatibility as to make the experience seamless. This is, from my perspective, an undesirable outcome and a significant inconvenience. The four things listed sound like they wouldn’t impact my experience except in terms of speed, so I’m tentatively unopposed, but I’m suspicious that it would be WebP all over again.