I've been able to install mybb and merge data from a phpbb 3.10 forum across to it, and noticed how flexible it is, i.e. converts from several different forums across to mybb.
Was thinking that perhaps this would be the most important conversion tool to be kept up to date for smf, because even if the other conversion tools are not updated, it appears that mybb merge tool is being regulary updated.
I know it means an extra step to convert from whatever to smf, but it means you can still get from whatever forum across to smf. :)