With the exception of weight and speed and cost of updates most of the savings are on Powerpoint slides. But even with the latter, the savings are still worth having and may well justify implementation. For example, my company no longer needs the support previously offered by huge teams of people in various departments just to keep the aircraft document libraries updated. But like every new system, it comes with its own new set of traps. Some of them are obvious and some less so.
Simply put, I don’t think there is a bug free suite of software anywhere in the world. This means new defences have to be created. Cross-checking should deal with some finger troubles, but not all. What is really needed is a cleverer system of the old fashioned “wet finger in the air” to deal with not only finger trouble but some of the rather nasty bugs that live in our EFB’s.
PM