Interchangeable devices won't. If a test installation functions perfectly, all subsequent systems will malfunction. If computers take over, which seems to be their natural tendency, it will serve us right. On a clear disk you can seek forever. Some parents will spend anything on their kids except time.
Progress always involves risk.
A truly wise man never plays leapfrog with a Unicorn. A rumour has it that rumours are just rumours. A wise man can see more from a the bottom of a well than a fool can from a mountain top. Beauty is only skin deep, but ugly goes clear to the bone. Behind every argument is someone's ignorance.