yeah way more activity about it over here on the lines forums https://llllllll.co/t/er-301-sound-computer/ I figure anyone super into it is likely over there. Most modular talk on elektronauts is in the “your modulars” thread https://www.elektronauts.com/t/your-modulars/
When I first was starting into modular I wanted to build a system around the ER-301 quite badly, but then the pandemic hit and second hand prices were a nope for me, ended up basing my system around the squid salmple instead and its amazing so I suppose no regrets there very immediate feeling euro sampler, still could imagine building an ER-301 system someday though.