Curious, those eating micro-sprouts (grass clippings)????.....
 

Does this produce long lasting life or would an occasional steak and trimmings have a similar outcome?????

People can add microgreens to meals in the following ways:
as a garnish for salads, soups, flatbreads, or pizzas.
to add nutritional value to a juice or smoothie.
as a side to any main dish.
to add flavor and color to an omelet or frittata.
as an alternative to lettuce in tacos or a burger or sandwich.
Google

The term itself - microgreens - is trendy and "foodie-ish" and popular among people who want to push a healthy vegetarian diet.

But the foods themselves are not a new thing. Growing up we grew bean sprouts in a jar in our kitchen. Sprouts of a variety of sorts are common in different Asian cuisines.

If you ditch the nomenclature, the result is "just normal stuff people have been adding to salads and savory dishes for hundreds of years."

Ditto.
You don't even need soil. We used to grow bean shoots in our airing cupboard, on old fashioned blotting paper.
Wet Paper on plate, scatter seeds, put in warm cupboard, keep moist, ready in about a week!

With pain that comes with old age I have to ask: "Do you really want to live a long-lasting life"????