I'm one of those old guys
and, I still have my Honeywell Pentax Spotmatic. In fact, it is the only camera I own and I use it on a semi-regular basis. These cameras are built like tanks, and while they may appear small, they are about the size of a Canon 20D which supprised me. I bought mine back in 1967 or 68 for around $350 I think, and that included the 50mm f 1.4 lens. Seemed like a lot of money at the time, but a Nikon F cost a couple of hundred dollars more I believe.
My only complaint is that the current batteries do not last very long. It seems that if you put in a fresh battery and don't use the camera for a couple of months, the battery dies. Not sure why, but the old batteries seemed to last for several years before they died.
I have used the camera it all kinds of weather during the year except for very heavy rain and have never had a problem. Worked well in the winter in the snow and the summer in high temps. And, if the battery died, the only thing not working was the meter. You could still go on shooting with a best guess estimate as to exposure.