I have many happy memories of caravanning in models from the 1960s onwards. In reality what a caravan did then and now is not very different. But things have changed, progressively over the years features have been introduced initially as a luxury, but after few years they become standard, and then some have acquired the status of being essential.
This has had the effect of generally increasing caravan weights, sizes and prices, which has also had an impact on the size of tow vehicles best suited for caravan owners.
There have been some positive changes such as better thermal insulation, less heavy windows and chassis, but equally the caravan manufacturers have not learned some of the most important lessons of keeping customers happy, fixing the issues like how make and keep joints water tight.
I don't begrudge anyone using luxuries, each to their own, and with increasing age, and disabilities I can appreciate the value of some products that I may have previously considered a luxury.
Would I go back to a 1979 model? Probably not. Certainly not it were an original 1979 model with its now rusted nails, corroded screws and panels with and loose joints where the glue has failed, etc...
Would I buy a new vintage style caravan to the 1979 specification - No