"The switch from FD to EF in 1987 was clearly for the better."
Of course the switch to EF was the right decision, it didn't help "US" with thousands of dollars worth of gear though. Also you both seem to have missed my point, which was, Canon will do what they believe is best and give us the cameras we actually need, rather than profess to wanting, and they have been proven to get it right enough of the time to make the sales they do.
The question would be couldn't they have done the same thing and somehow preserved the FD mount?
Or was it a sales gimmick to force people to buy new gear. Remember we're talking 1987, in technology terms digital photography for the masses was a long way off.
They had to make a decision.... control the lens digitally... or control it with analog signals.
Unlike older systems where every function had it's own pin and there were even some systems where the lens was driven from a motor inside the camera body, the EF mount was simplicity redefined. Power, ground, data in, and data out, and a clocking signal.
They really didn't have the option of a hybrid system as that would have done nothing well. Keep in mind that digital sensors were emerging then and the writing was on the wall.... the film DSLR was on the way out and there was going to be a massive upheaval in the industry. Lenses were already at the point where it made more sense to control them digitally so looking at the future, Canon really didn't have much of a choice.
BTW, I got my first digital camera in 1986....