Well, Time Machine got by rear end out of trouble just before Christmas when my old 2007 MBP developed hard drive issues that couldn't be repaired without a reformat.
Seemed a good time to treat my self to a new machine, since flakey discs rarely become unflakey (got an MBP 13" with an SSD).
From deciding a new machine was needed to being back up an running was probably 6 hours, including the time it took to go to Watford and buy the new kit. 3 accounts (admin, main user, diagnostic user) A few serials needed reentering but other than that it was flawless.
I have Dropbox as fallback for mission critical stuff.
And now the old one is a media server until it falls over completely.