I am fascinated by environment-centred design principles. As someone who posts a lot of images and the occasional video, I feel a bit guilty (though I offset it by not consuming pr0n). I would like to compare the impact of different approaches.
Re: header images
I think this is a legacy of social media sharing and cards etc. On Twitter, sans titles, these are now especially useless.
Look forward to seeing how activity pub works and how to reduce the number of emails.