* Arduino SDK does not rely on ESP-IDF, so this doesn't matter.
* Irrespective of when it landed, ESP-IDF already supports RISC-V ESP32 devices well, and will increasingly focus on RISC-V devices thereon, as Espressif is committed to RISC-V going forward.
RISC-V support only just landed in ESP-IDF. Give it a couple more years imo to reach full feature parity.