I spoke about avoiding SUX, or some user experience, at MagnoliaJS in 2019. You can find the slides for "How to Avoid SUX" on my GitHub.
I'll be speaking at Render(ATL) in May 2020 about progressive enhancement for React. I hope to see you there!
You can find the slides for my talk about P.O.U.R. at the July 2019 JAWAD Meetup on Github.