If you're referring to Friedland, then your assessment here is incorrect. The Russians weren't withdrawing, they were forced to stand and fight. Bennigsen did issue orders to withdraw, but had to cancel them when the Grande Armee showed up under Napoleon after Lannes' expert delaying action.

Define what you mean by 'a lot' of infantry. Senarmont's advance was the de facto main attack of the day since the planned one, Ney's, was repulsed. Maude wrote an excellent monograph n Friedland highlighting Senarmont's action. And it wasn't one of a kind. A much larger artillery attack was done by Drouot at Lutzen, for example, using a little over twice the guns that Senarmont did at Friedland.

Both artillery attacks were successful, effectively destroying the enemy's center. Yermelov speaks of Friedland in his memoir, and Flauhaut describes the destruction wrought by Drouot at Lutzen. Whole regiments were effectively destroyed by the artillery attacks and Senarmont defeated a Russian cavalry counterattack against the left flank of his large battery at Friedland.

The new artillery tactics introduced by Senarmont in 1807 were not one of a kind and were used after when the opportunity presented itself.

Sincerely,
K