Too iffy for me. And if the main roads were clear enough, the idiots on it were much too scary, and I would have had to push on the final exposed hill that had a decent layer of firm slush - I really can't figure out how other people ride on untreated paths.
At 3am I struggled to get up the stairs to the bathroom - yesterday's hiking had done something nasty to one of my big thigh muscles - to the extent that I didn't see any point in going to work and not being able to walk around - which is the nature of my work...
Maybe this caused me to oversleep, but when I woke up, I realised my leg was better - I took far too long to get out of the house but thought it better to walk - I had managed to find sufficient change, but really couldn't face two buses.
Touch wood, though I'm not without a little discomfort, I made the right choice.
I suppose it's significant that over the past year I pushed myself even harder on the bike to the point where I no longer got cramp if I push it to the max. I now have sprinter's muscles and can no longer walk 3 1/2 miles without it feeling like an expedition.