I grew up with Great Depression era grandparents that I spent a lot of time with and my dad and his parents were antiques dealers, so I got used to appreciating old and classic stuff that lasts forever. I'm glad to see some of it coming back.
I have a ton of oak furniture that I love that is over 100 years old and looks new, but I get why it's not as appreciated these days. It's heavy and of a definite (though classicly styled, in my opinion) time period, and it isn't really meant to be changed out with the times and it's hard to move now that people seem to be much more mobile than back in the pre-car era when this stuff was made. And there isn't much point in buying something built to last generations if the future generations don't want it or feel burdened by it.
Both the thermos and the lunch box are heavy duty enough to be used for self defense, should the need arise! It's a ton of material that I feel it would be better if people just didn't buy them if they want multiples or buy them and not use them. My wife has a growing collection of heavy duty double walled bottles and tumblers that are increasingly taking up space, and it just feels so wasteful to me just to have a different color or whatever the reason is for having multiples.
Buying used, like your Primus, is really good though that it has lasted long enough to find someone to appreciate it again while consuming no new material/energy.