Which part of the CIA triad have you found most difficult in recent years & why? Is emerging tech making one area especially challenging these days?

Integrity! Very hard to keep the trustworthiness 

I would say integrity if many folks are involved in updating and changing.

I'm not sure I've found any of these to be the most difficult, but I think "I" is the most interesting. If you consider supply chain hacks in the past (e.g. Solarwinds and LastPass), and if you consider what AI potentially can do with deep fakes, that's why I'd vote I.