I'm surprised at the massive and rapid response to my posting. I'm even more surprised at its positive nature. I would have expected you folk to be the ones who carry on tuns and try to stuff too-large carry-ons in the overhead. Oh, well, what's life without surprises?
Mileage Addict: I've also had "indestructible" luggage damaged. But, then, that stuff's always too big to carry on, anyway. And who's to say it was really the airline's fault? How about the luggage manufacturer? The couple of times it's happened to me, the airline paid, and quickly, for repairs to the luggage. Sure, it doesn't look like new, and sure, I don't use it any more. I blame the manufacturer for misleading me.
Baobab: I can't comment on third world countries, because I never go there (although Russia might now be considered a third world country). My comments are directed at domestic travel - I no longer travel much internationally, although I communted to Russia about six times a year in the 70's.
CATMAN: (Note that I put that in caps). I think I may go even a bit farther (further?) than you. The only thing I carry on is my briefcase. In there, I have the "necessities" package given to me by BA several years ago. It includes all the necessities (tooth paste, tooth brush, etc.). Shaving will be a problem, since I have used an electric or years, and this is a blade. But it works, and I've never had to use it. Underwear, etc., I figure I can wear for a second day. If I have to, which seldom if ever happens.