Well, you won't get rich. But it's also not chump change and can radically alter a person's quality of life.

$200 a month tossed in a decent investment over a typical working life will yield something like $200,000 by late middle age. That can be the difference between near-destitution and reasonable comfort in retirement.

a few hundred dollars per month is just for the car. Apply this principle to your entire life and it could be a thousand or more dollars per month. Literally.

I had out-of-control spending until I did a detailed audit of my finances 5-ish years ago and I changed my lifestyle in lots of ways: cheaper car, very few restaurants, cheap vacations, cheap hobby, cheap mortgage... it literally has saved me about $1700 per month (yes, literally... I earn a good amount so I had lifestyle creep!). This savings promptly goes into an investment account. That amount over 20 years could become $775,000 if invested!