FT8 - the "new" digital mode?

So far, I have used FT8 on 630m, 10m and 6m. It is very quickly becoming the de facto digital mode allowing quick exchanges of basic QSO data whilst still using very little spectrum. It is not really a mode for chatting.  It seems to have transformed 10m. Spots on 10m have amazed me.

Complete QSOs can be completed in a very short time. As far as I know, unless things have changed in the last few days, it is still a "release candidate" rather than a formal release. At the moment I am still using rc2 although rc3 is available.

See https://physics.princeton.edu/pulsar/k1jt/wsjtx.html .