After my walkabout yesterday, as I checked out the images I made, several had hand shake issues. I had noticed on the walk that my hands aren't as steady as they used to be so it was hardly a surprise. None of the images couldn't have used a tripod and presumably there would have been sig. fewer flawed images - rejected for hand shake despite image stabilization.
I'd thought that not taking the tripod would let me concentrate more on seeing, but in hind sight, I don't think that's true. Had I put my lightweight tripod on the camera and carried both over my shoulder, I could just as easily have wandered around. Setup might take a few seconds more but I don't think it would have interfered with the experience.
On the other hand, I have been thinking of photographing in an old part of town, with shoppers around. Setting up a tripod could well be problematic in that situation and grabbing shots between pedestrians might well depend on not using a tripod. Were I to include the shoppers, then even more the tripod would likely be in the way.
I guess what it comes down to is:
Always use a tripod unless you have a GOOD reason not to.
I'll try another casual walk later this week, with lightweight tripod and let you know the outcome.