[lm28469]

"During this year I missed out on a Mozilla all-hands, I’ve been invited to the US several times to talk at conferences that I had to decline and a friend is getting married there this summer and I can’t go."

Wouldn't all these things be covered by an esta?

https://esta.cbp.dhs.gov/esta/

Edit: nevermind he talks about it in the other linked article https://daniel.haxx.se/blog/2018/07/28/administrative-purgat...