Aspirin might well be considered the top utility player in the medicine cabine.
what does the "might well" mean?
"Could well", "May well" and "Might well" indicate that there is a quite high probability of something happening. The level of probablity being somewhere between may and will.
ie It's more likely than "may", but less likely than "will".
"Might well" is slightly less likely than "could well or "may well".