None that were at an "omg this changes everything" level (though the Sixels one could be that when the project is more mature).
But I liked David Kunz's talk a lot, and the #Lua primer was pretty useful.
"The philosophy of vim" was nice in a nostalgic way, about the way computing starts to feel different when using #FOSS tools, and gives a feel of ownership over your software.
(I watched from David Kunz's talk upto the Sixels one.)