There's still some writing to do, but everything that's at all complicated in terms of code is fully written, coded and imaged. I started testing late last night, and already getting a lot of great bug reports and getting them fixed.
I normally try to start testing around the 25th, but I had forgotten that February is a shorter month. It will push back the release of c6m0 a few days. I should be before the 10th, but probably closer than usual to it. And that will also push the public release of 5m4 back until 6m0 is ready.
But I can give you a few more teasers of 5m4 at least!