The 2024 RISC-V Summit is already in the planning stages, but if you missed attending the 2023 version, then you’re in luck. The keynote and technical session videos are available.
I was able to attend but missed most of the technical sessions. I picked a few of my favorites and included them below. The first is a long one by Keith Graham from Codasip on custom instructions for RISC-V. Like Arm and other embedded processor architectures, the RISC-V instruction set doesn’t define all combinations.