AMP sites have a 8 seconds-delayed CSS animation on the body element, turning visibility from hidden to visible.

This animation is turned off instantly (as far as I can say) by Javascript. However when you block Javascript entirely or block ampproject.org you have to endure the whole 8 seconds. I inject "body {animation: none !important}" into all pages to remedy this.

That slows down AMP pages relative to nom-AMP pages when JavaScript is disabled. This is not in the complaint.

Is it possible to see this in action on desktop?

It is deemed to have an RNA repair mechanism. This is suggested by analogy with other coronaviruses [1,2] and the length of its RNA of ~30k nucleotides while the upper limit for RNA without repair mechanism seems to be 10k [3]. The german wikipedia cites [4] which I found nicer to read.

[1] https://en.wikipedia.org/wiki/Coronavirus#Replication [2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4984655/ [3] https://de.wikipedia.org/wiki/Coronaviridae#Genom [4] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3127101/