I think the unit of measurement - for space, time, weight, money, or whatever - should be based on it's utility. So I see no value in knowing that quaffing my Potion Of Health will take 12 times 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom (which is what 12 seconds really is).
Look, it's fine if you disagree with everything I've said, but I actually gave specific examples of situations where the methods I described at least might work better. Here it sound like you aren't saying that you dispute the validity of those examples, but instead it seems like you are just ignoring them. Again, I am totally fine with you completely disagreeing with my ideas, as long as you have a complete understanding of what those ideas actually are.
Every unit of measurement is a comparison to something else; which is why, in real life, I still view purchases in terms of how many dinners they cost rather than how many dollars they cost - that's a far more important comparison for me. I don't care about how many milliseconds my actions take any more than I care about the currency exchange rate between Zorkimds and US dollars
You instantly know how long an action took, without requiring any other context, if I tell you it took one second. You do not have any idea, without context, how long an action that required one turn to complete took. Even within a gameplay session, turn lengths are variable if the PC's speed changes over the course of gameplay.
If these things don't matter (and usually they don't), I think you should do things exactly as you described. But in the situations I am describing, my methods may be better. That's all I'm saying.
Another way of looking at it is that I like the turn based way of looking at time for the same reason I like the grid based way of looking at space: coarse-grained abstracted units are easier for me to mentally handle.
For example, if I (who is 1 tile big and can move 1 tile per turn) am 3 tiles from a door and a bat (who is 1 tile big and moves 2 tiles per turn) is 9 tiles from the door, I know that I can get to the door in 3 turns but the bat will take 4 turns. So I'm safe.
But if I (who is 1 foot 2 inches by 2 feet 1 inch and can move 3.5 feet per 1045 milliseconds) am 8 feet 10 inches from a door and a bat (who is 7 inches by 1 foot 4 inches and moves 4.1 feet per 790 milliseconds) is 21 feet 4 inches from the door, I need to do more calculations than I'd like to if I want to figure out if the bat will bump into me before I can make it to the door.
And using coarser measurements is fine. I'm not saying that is a bad way of doing things at all. It is a fine way of doing things. Again, all I am saying is that in some situations (the ones I described) it is better to do things a different way.
Admittedly, I would be lying if I said I didn't fantasize about games where creatures had volumes and distances were measured in millimeters rather than squares.
Although I could be wrong. Do you have a prototype you can share with us?
No.