I don't really see the 7BC ever being super popular, it's too niche.
I just saw a post on the gram of a nice looking Tikka build in 7BC. Tikkas are solid actions, they just don't seem to tolerate high psi as well as other options. 7BC at 80k+ psi? Be interested in how that all pans out.
Now once 556/65cm/308 peak cases come about, I think they'll really take off. You're basically supercharging your current rifle with 200-250y extended terminal range. Practice with standard psi brass loads, re-zero and hunt with the fast stuff if the precision is adequate.