1. Running was truly blue collar and hardscrabble back in those days. Most athletes came from working class backgrounds and were not the progeny of country club suburbanites. There was a tougher work ethic already baked in from watching their parents and grandparents toil to put food on the table.
2. Lydiard was the basis of all training. Run a lot of miles, do some strength and speed, go race. No one was worried about heart rate, Zone 2, threshold, cross training, etc.
3. You succeeded as a runner by age 24, or you quit. Winners and record holders were celebrated. There was no feting of local heroes, age group winners, also rans, inspirational stories, and the like.
4. There was virtually no money in the sport. Some under the table cash, plane tickets, a few pairs of free shoes were the best that you could hope for. Athletes did it for the love of the sport and to be recognized as a great champion. Today, if a post-collegiate runner gets some gear and a small stipend, they swagger about calling themselves a professional runner. Back in the day, you won a marathon and then went back to your job on Monday morning. Rodgers didn't make much until he opened a shoe store and created his own clothing company.
5. Depending on your point-of-view, the shoes were better or were absolute crap. The Altra Escalante or the New Balance Minimus would be considered plush by 1970s and 1980s standards. Shoes were designed for athletes, not chunky people in midlife crisis. One school of thought is that those hard soled shoes strengthened feet, joints, legs, and built greater bone density than today's bouncy house footwear. They also enforced efficient running form. You got better and more resilient or you wrecked yourself.
6. The crap diet of that time was probably more nutritious than our highly processed convenience-based foods today. Fresh fruits and vegetables were cheap and more widely consumed. People consumed more water and milk back then.
7. Athletes and coaches labored mostly in isolation. You might hear rumors or see a magazine article that Finns were doing something new, that Japanese were running insane mileage, or that East Germans were hitting the weights hard, but you trusted your process and took that into race day. You were not bombarded with Internet rumors, studies of recreational runners getting better results with HIIT, or self-appointed charlatan coaches claiming that their system produced better results with half the workload.
8. Life was simpler. Run, eat, work, run some more, eat some more, sleep. No mindless scrolling, social media posting, video games, online porn, streaming, binge watching, and such. This left more energy and time to pursue excellence.