This is based on feedback from a related TAG review.

View transitions also need to be considered in #5321 and #7440.

There seems to be an attitude that view transitions are primary content under the complete control of the page author. This violates the priority of constituencies and potentially creates inaccessible content for many users.

It needs to be made clearer that view transitions are an enhancement and the web page should not break if they are disabled (and given the script component, it may be necessary to define behavior when they are disabled). The user also needs a mechanism to disable them.