One last comparison, might be the most important.
Demographics
70's and 80's saw the Boomers enter their peak earning, spending, and investing years.
2020's will see USA millennials and genX/Y enter their peak earning, spending, and investing years.
Boomer capital movement and productivity were strong fundamentals into breakout and also changing of the guard
expecting similar from USA millennials ... could be real reason such bad monetary and fiscal policy hasn't crushed USA economy (yet).