I fall victim to them myself as well, and I have a vested interest in ensuring that these things don't happen.
Sign In Canada will essentially permit you to choose the “no wrong door” approach to services, accessing federal services from a province or a territory, or vice versa, and possibly from your bank as well. We do have the security regime to put this in place, but we didn't have the rules framework in place.
Sign In Canada means that you could have access to ESDC services from CRA. Also, we are in active discussions on possible pilots and projects with the provinces, where we would give federal services through the provincial ID system as well.
It's very different from the Estonian model, which is a singular approach to it. We are taking more of a “no wrong door” approach to services, as long as a rules-based approach is followed.