I came across this very interesting talk by Joe Taylor K1JT on the latest weak signal digital modes and it can be seen below. It's over an hour long and it gives a good overview of the status of the various weak signal modes in use at the moment (March 2018) on HF and VHF.
Unless you are actively using these modes, it can be hard to keep up with all the changes so I found the video very useful.
One of the interesting slides used in the talk is shown below...
The data for this chart is from all the logs updated to the CLUBLOG website in 2017. It shows how the new FT8 mode has really exploded since it was released and how it has replaced the older JT65 and JT9 modes.
It's also interesting to see how CW is still doing reasonably well and is ahead of phone! Not sure why the second half of the year is lower than the first half though?