When I compare the size of a Rebel XSi to my film Rebels or EOS 1V, there really isn't a lot of difference in the size or weight when a kit lens is fitted. It's when I fit an additional power booster to the EOS 3 or 1V that the heft and size goes up on them as I use 8 AA batteries in the boosters. Add some of the new mega glass and there goes the scale needle again. Granted, in my books, some of the improvements like being able to take movies, etc, are things I'll never use but then some people demand everything including the kitchen sink in a camera body and lens. Trying to get a basic full frame digital now without a ton of features is almost impossible unless you spend a ton of money or buy a camera several years old, but then one always has the off switch. I think one of the reasons I can't be bothered buying a digital is the thought of paying for features I won't be using in the first place.
I do have to agree with you on the feel of some of the newer cameras. Comparing an 80's camera to the current crop is like comparing apples to oranges but then some of the newer bodies are a lot easier to carry over the course of a day's photography just because they're lighter. So are some of the lenses when I compare them to some of my all metal body lenses that I use on my maual focus cameras. Yes, lenses were smaller but they weighed just as much as a lot of lenses today. Carrying a couple of A-1s and 4 telephoto lenses in a camera bag can make for a sore shoulder at the end of the day. LOL Even carrying the EOS 1V and EOS 3 plus lenses can make for sore shoulders too because of their construction.
As far as value for the money, I think that would depend on the individual. You may not think that the current crop of cameras has the value for the money but then there's a ton of folks that will disagree with you in a heart beat. (As you see...

) There's been a lot of folks that have gone to digital just because of the volume of photographs they take and the value for them is the amount of money they save in cost per photo, some because it's the only type of photograhy they know, some because of the versatility of their digital cameras in being able to change ISOs or go from color to black and white with the press of a couple buttons.
Like you, I'll stick with my film cameras that don't go out of date every couple years

and keep enjoying the photographic experience. Hold off for a while on looking at a digital. I'm sure that some whiz kid camera designer will get it thru their thick skull that more isn't really better...
One thing I've noticed and I may be corrected on this. Cameras started off large with the view cameras, then gradually got smaller with roll film medium format and finally 35mm and smaller sized film. Now with digital cameras getting larger and larger... I wonder....
