The trick is to find a feedback scheme that does
not compromise the forward-path performance.
You could sample, but this inserts "stuff" into a
continuous-time path that will need to be taken
out, and/or dealt with. You could use a very-low-
pass filter to try and pick up the DC error, but
this tends to pick up residue of dynamic activity
and input signal imbalance / history.
What does your application want? High or low speed,
sampled or continuous-time, ???