Mike,
Golf has muddled through for 500 years or more. It will survive, but some of your examples show that a real change in mindset will be forced upon us and some will change kicking and screaming. But, we don't need to change golf 100%, we need to change it about 10% or so, maybe 15%.
Frankly, the clients I work for probably have inflation adjusted maintenance budgets that are far less than the 1980's and they get better results. Ditto on the professional side.
I do believe that the 1980's began an era of convenient amnesia amongst elite in the golf world. Research money was spent on developing grasses for play quality, mostly because of JN and a few other pros had the floor and that is what they lobbied for. But, just like distance increases, maintenance increases seemingly have gone up 4X for the top clubs, while most of American golf courses exist at only slightly higher levels of maintenance.
I believe that turf research (as Tom D alludes) is now moving towards genetic resistance to diseases, drought, etc., because that was trendy in the 1990's. Perhaps the results of that work will be seen soon to a large degree.
Certainly, research started now will reflect current economic concerns, producing grasses that can grow in compacted soils perhaps, be easier to maintain rather than better maintained, etc.
I am a firm believer that no one wants to go backwards, in ball length, general maintenance levels, etc., so that leaves science as our best way to adapt golf to future conditions. I hope we are at least as savvy as the generations before us in doing that to keep golf going!