Agreed, there might have been valid reasons for people, especially older hams, to complain back then. But those still complaining today couldn't have been that old when incentive licensing was implemented. If they're, say, 95 now, they were no more than 50 then, hardly an age where infirmity would be likely to present problems with taking more tests. To put it another way, anyone who lost privileges but is still complaining about that loss today has had almost 50 years to upgrade. For those who have upgraded, why nurse the grudge? And for those who haven't, why not take those tests you keep telling us are absurdly easy compared to the ones you took in the good old days?
(Aside: for what it's worth, it was extremely difficult for me to get to an FCC office in those days; I had to wait for 5 years after taking the General to take the Advanced. That wasn't worth whining about, either. There were plenty of frequencies available to me as a General, even after incentive licensing.)
QSL, you are 59. i think one of the rubs was that top class used to be the only one with full HF phone privileges till the FCC decided to give all license classes all privileges. then 1968 rolls around and suddenly they get HF phone frequencies taken away (small amount or not is beside the point). Doing that was tone deaf on the part of the bureaucrats who implemented it. former Advanceds (since those who were once Original extra's or Class A's all got folded into Advanced at a later date) should have either been grandfathered or still allowed full phone privileges.
like you said -- anyone around now would to have been fairly young in 1968 and could either have upgraded or remained Advanceds as a matter of principle or stubborness, depending on how you look at it.