Mark,
The back tees at my home course haven't changed much over the last 40 years due to the confines of the property.
While we have lengthened a few holes from the back tees, almost none of the white and ladies tees have been moved back, in fact, new shorter tees have been added for the ladies and, we've added Senior tees for older members as well.
I suspect that courses tend to play softer because generationally, today's younger players want to tee off at the crack of dawn so that they can get back to their families sooner. In my dad's generation, they played at 9:00 had lunch and played cards in the afternoon. The wives came up, teed off at 2:00 and joined them for dinner and dancing.
On many golf courses wednesday afternoons and saturday afternoons were reserved for professional people, doctors, dentists, and lawyers with saturdays for the same group, plus local merchants. So afternoon play was prevalent.
Today, it seems that early morning play is prevalent and that many courses have lighter afternoon play.
I'd like to think that the courses have gotten harder, but, the sad reality is that I've lost a good deal of distance.
On holes that I used to hit driver, wedge, I was hitting driver, 3-wood. Fortunately, I've been able to gain back some distance, but, I think my days of playing at 7,200+ yards and having a real chance at a good score will be rare at best.
I see more and more interesting greens flattened in the name of speed and fairness. Noone stops to think that maybe their greens have exceeded the speed limit as intended by the original architect, and rather then simply dial back, they ruin the character of one of the most important features on their golf course by squeezing the distinctive life out of them, by flattening them.
I see bunkers removed.
I see the faces of bunkers softened
I see bunkers made shallower
I see barriers of rough between bunkers and fairway.
Perhaps Tom Huckaby hasn't seen these things, or perhaps he's seen them, but can't remember them.
JES II's point about member gratification is germane, since to a great degree, that's the driving force within memberships to soften architectural featurs.
Of course, that's just my opinion, I could be wrong.