I have a pair of Johnson & Murphy dress shoes that I bought in about 1986-1987 and they still look great, re-soled and re-heeled at least 3 times, but relegated to "occasional dress wear" after about 3 years of regular use. But they are heavy as hell and cost about $150 even way back then. And I have taken very good care of them.
Hey, wait, I am typing on a 1984 keyboard that weighs over 8 pounds!
But for casual shoes, I love the fact that shoes today weigh nothing. I do not object to replacing plastic shoes often if they are lightweight and comfortable in the meantime.