The one thing that I have always wondered about with the Stingrays is why they went away from having string through body bridges? My Stingray Classic has one and I totally prefer that style bridge over a standard bridge.
That happened in the wake of the 1979 fallout with CLF (Leo seemed to be secretly focused on G&L, and somehow 2000 Stingray necks got manufactured with duff truss rods).
All manufacturing moved out of CLF, the necks got outsourced to Jackson, and they stopped bothering to pour epoxy over the preamp - which was probably more of a "time = money" cost cutting measure, than a less paranoid environment for corporate espionage.
Again, I'm guessing, that Music Man simply used up the existing stock of bridges, before going with the same "time = money" cost cutting formula : drilling the holes, and fitting the ferrules all adds up to extra time per instrument, and fewer instruments made (and of course the occasional screw up, where a bridge, or body, has been slightly misdrilled).
It may also be the case, that after the CLF fallout, Music Man had to negotiate a new deal for bridge manufacture ; so add all those factors up, and a top loading bridge may have been the only feasible solution for the company, at the time.
Of course, they may have simply decided that a top loading bridge was the best choice, either for technical reasons, or in terms of customer demand :
I'm not sure about the U.S. but in the UK, throughout the 70's and 80's, and even in to the early 90's, string choices were pretty limited, and string through instruments
could be a real pain, depending on the scale - you might find the silks the wrong side of the nut.
There are always gripes (unfounded, or not) that flat wound strings are more prone to breaking, on a string through instrument - I couldn't really comment on that, as I rarely use flats.
Personally I avoid string through like the plague - though that's probably totally unnecessary these days, and it's just become a personal preference (and one that I may have to get over, if I'm ever going to give in, and own a Mustang).
It's the double whammy of a slab body, coupled with string through setup, that Pre-Ernie Ball, and EB Classic Stingrays are
not for me.