My first road bike was a 1976 Motobecan. The next was a 1987 Specialized Both had down tube shifters, 5 and 6 speed free wheels, 36 spoke wheels, and weighed 26 ans 23 lbs respectively. I compare that to my 14 lb CF bike with Di2 and Zipp wheels and the difference is night and day.
At my age I want every performance edge I can get. Riding is also more enjoyable going faster, cornering quicker, climbing easier, and getting quick and dependable shifts every time. That last piece is probably the most significant comparison I can make as far as enjoyment just riding along.