Actively worrying about metagaming is something outside my experience. Metagaming feels like a lot of other things in life that I don't actively worry about - what the person next to me at the restaurant ordered or how fast the car in the lane to the next of me is going, or what the kids on the other side of the park are doing. But even if I don't worry about it, at some point I'll notice if the person next to me orders 25 hamburgers - hold the pickles, the car to the left of me is going 10 mph under or 40 mph over the speed limit, or I catch in the corner of my eye that the kids appear to be standing around a body or looking at kite caught somewhere I could reach but they couldn't.
I think that's how metagaming is for me - it's when it actively catches my attention that it bothers me. So, the daily recharges in 13th age didn't bother me -- until I started to notice them because we were stuck on a boat for a week and the day hadn't passed yet. The character going down the particular side of the caves of chaos and on the particular level to get to the particular bad guys is just one choice among many -- but passing all the other doors to go to the exact one and then using the correct passages, would seem out there. Knowing to use fire on random things that regenerate or knowing some common thing regenerates seems like a whatever, having studied up on some technical engineering things so your 6 INT Druid knows exactly how to solve an issue with some machinery not so much.
I know there are folks on here who stopped policing metagaming because they couldn't stop worrying about it - and that seems an entirely reasonable response. I wonder how many people super notice it in everything if they enforce it, and how many others just have a line somewhere above which it becomes noticeable and annoying and where it very rarely gets to that point.