That would be the question to their Customer Service.
The issue that was addressed in HF27 didn't affect anyone other than backup witnesses so it is hardly an excuse. Moreover that hardfork didn't even require replay. Just stop the node, replace executable and start again. Not even five minutes of downtime once you build the exec.
So, Binance either messed something up quite badly or they're just taking a while because it's not a priority for them.