Well Chris, I have never had the chance of looking at the cockpit of NGs but my guess is that their CB panels are still in place and accessible too, since the Boeing philosophy encourages pilot intervention more than Airbus that is more Biased to Aircraft Automation and system monitoring autonomy, but then again i am not really sure....and i am sure that veteran pilots like yourself had a completely different ball game back then when aircraft were still all conventional, and it took a real pilot to fly, nowadays, all it needs is an operator
....i started my career as a junior F/O on DC-9 so i can tell how different it must have been back then.....
And yes it is kinda frustrating for people not to be able to see inside the cockpit anymore, especially Former pilots and aviation enthusiasts, and i remember too when it was ok to go inside and take a look or get a photo and chitchat for a while, as my father and 2 uncles were pilots, and as a child i went in there a lot, but not so long after i started my aviation career it became a big NO NO, with all the measures and re-enforced doors, etc.
then again if you consider the security threats we are facing nowadays, it only seems wise to do so......
I guess you can get your glimpse and lot more if you attend one of the aviation EXPOs that are held in many places around the world, they give you Aircraft/cockpit visits for all the A/C on display there.....I had a chance of going into the A380 cockpit in Dubai AVEX 2008.