Re: Industrial Espionage is Alive and Well and Kicking in Multi $Trillion Corporations/Corpses. *
" Yes, they will take insight with them, but I think that game has been long dealt with. I suspect these guys have only been given enough data to develop as required, but not much more exactly because of the well established revolving doors between companies."
I suspect you are wrong. These are elite engineers at the top of their game - its unspoken that they take the designs and skills from one employer to another - trade secrets be damned.
No-one tells the lawyers unless someone does something stupid like trying to walk out with a load of spec's on a USB drive.
It probably helps that these things are so damn complex that only the general design principles, troubleshooting skills and years of learning "on the job" are the portable bits. It's not like they can hold entire chip designs in their head, much below the 10,000 ft view. Albeit lock them in a room with at team for 6 months and they could probably re-generate the blueprints for the M1. But nerds being nerds they wouldn't. The'd build an M5 or M6 instead with all the previous learning incorporated.