Re: Not surprised...
Dear Odd,
We are reliably informed that the IT-technical term for erasing a working system before the new system is up is "hubris".
Even at home, you replace a hard drive long before you expect it to fail, because new hard drives are quieter / more capacious / more reliable than the one you're using. Then you put the old drive on your secure shelf as a known good working backup. In addition to any other backup systems you have in place. It's "free", or nearly so.