Actually, the Rabbis never forbade the use of the name YHVH. They simply said that its use is only permitted when we are certain of the correct pronunciation, and under the proper circumstances.
We no longer are certain of the correct pronunciation, nor have been since the first century CE, if not a little before. Therefore we do not use that name, lest in mispronouncing it we disrespect God's holy name.
If, someday, we become certain of the correct pronunciation again, we would be expected to use it again in the proper circumstances.