FWIW in many companies and organisations, including large parts of Google (from personal experience), OKRs are not interpreted with the 70% benchmark, but more

FWIW in many companies and organisations, including large parts of Google (from personal experience), OKRs are not interpreted with the 70% benchmark, but more along the lines of "this is what we want to achieve, more or less - more is better, a bit less is acceptable, if we didn't mostly achieve what was specified in the KRs that's not good enough". Some objectives lend themselves easily to 70%+ targets, and others benefit from tighter control - that's context-dependent.