There are two possibilities.

1) There isn't consensus that improved syntax for error handling is needed in the first place. If that is the case, they should just say so, instead of obfuscating by focusing on the number of proposals and the length of the process.

2) There is consensus about a need for improved error handling syntax, but after seven years of proposals they haven't been able to find community consensus about the best way to add said syntax. That would mean that improved syntax for error handling is necessary, but the Go team is understandably hesitant to push forward and lock in a potentially inferior solution. If that is the case, then would be reason to continue working on improved syntax for error handling, so as to find the best solution even if it takes a while.