Lost coins could probably be modeled by exponential decay that asymptotically approaches zero. Again this is irrelevant because divisibility can be patched.
bad to know that, you can lose all your money on a patch
If you have 1.00000000 Bitcoins and they add another 8 decimal place then you still have exactly the same as before 1.0000000000000000
1.00 = 1.00000000 = 1.00000000000000000000000 its all the same number, just more precise