What sort of things would you discuss - Z80 has such poor performance compared with modern processors that surely no one would use one in a new project ?
What would you be looking at doing? Most off the shelf safety controllers used in industrial applications that require certification (very few safety applications don't!) are dual processors with watchdogs to each from each to ensure that it all behaves according to plan.
If you want to certify this application for use then there is a very long road ahead to get certification to the relevant standards.
