Its a cheap, compact way to maintain temperature in colder climes.
Do you pack base layers?

I have way too many lawyers, don't need to wear them.

Married to one. Keeps me pretty warm. Sometimes too warm.

Oh heck yeah - says the Canadian prairie boy. Mid-weight tops and bottoms plus regular underwear, socks, toque and bandana. Plus extra outerwear - gloves, wool anorak and insulated bibs. The other day I transferred my kit to a larger pack instead of hanging a bunch of stuff on the outside, all the items are inside.

Routine. Have done so for years

You have 'too many lawyers' Doug?
Just how offensive are your knees that you need lawyers if you get seen in your underwear? :-)

In long johns one looks like cowboys in comedy westerns. An advantage as far as I'm concerned.
Qjs

Though I am moving away from cotton to the high tech fabrics