I dont think it was ever rolled back. iirc Chrys was one of the first to get it at the beginning of the year and has remained on it. There's a couple of others too such as tickmike. Interestingly some of those were the ones who didnt actually get g.inp.
It just ground to a standstill during the ECI G.INP fiasco, but seems to have been restarted again since Openreach decided they were going to delay re-rolling out what ever went wrong with G.INP.
Had a few problems here since x206 was rolled out which may or may not be related, but just after the update I got the thousands of CRC and E/Secs which were nothing to do with me and obviously at either the cab or further back. During this time my connection was unusable for the day because so many packets were being dropped. DLM punished me for this despite it not being my line.
We also had a massive outage a few days later when I couldnt even access the internet for ~12hrs.