While capturing a cannon was pretty prestigious, the captured gun itself wasn't all that important to have. Their chief purpose seems to typically have been to be parked outside the regimental barracks and officers club. Or in case of Russians guns captured at Sevastapol by the British, used as a source of bronze for the Victoria Cross.

The uses of a captured cannon were rather limited. First, gun crews don't grow on trees. Infantry and cavalry were pretty easy to recruit and train, but skilled artillery crews required extensive training.
Secondly, obtaining sufficient ammunition was a problem. The bulk of ammo was kept some distance to the rear of the cannon and was in a horse drawn caisson that could be hauled off at the first sign of trouble. And there was virtually no ammunition commonality. A six pounder gun from one country would be unlikely to fire the six pounder shot from another country, because weights weren't the same. Even if one managed to obtain sufficient ammunition for captured gun, the different shot weights would be a strain on logistics.

So, aside from guns being turned upon their previous owners during the battle the use of captured guns was relatively rare. Pretty much reserved for those armies that were desperate for extra ranged firepower.