lobste.rs is the closest, I think. The requirements to become a posting member, are different (by referral, at least for now). Good, if software tech is prima

lobste.rs is the closest, I think. The requirements to become a posting member, are different (by referral, at least for now). Good, if software tech is primary interest (but there much fewer discussions (and participants) in mathematics, chem, structured engineering, physics).