This year, the Sitecore Symposium went virtual, like all other conferences! They did offer some really interesting free content for current Sitecore developers.
Keynote speakers and tons of breakout sessions can be accessed on demand until the end of 2020. Access it here: https://go.sitecore.com/e/857953/agenda/ycl9n/88231869
The conference was shaped around Sitecore 10 and moving into JSS 15.
Take a look and see what’s new!