If you're asking about heavy lancers in general then at this time they weren't quite extinct yet in western Europe, though they were largely on their way out. John Cruso's Militarie Instructions for the Cavallrie still included instructions for the training and use of heavy lancers in 1632.
There was a continuing debate over lancers vs reiters/cuirassiers, but overall the lance seems to have been losing. Though Gustavus Adolphus was credited with discovering during the 30 years war that his reiters could defeat polish hussars if he ordered them to charge aggressively and hold off their pistol fire until melee, yet Francois de la Noue was making pretty much the same argument as early as the 1580s. He pointed out that lance charges rarely killed anyone in pistol-proof armor and could at best injure the horses, while the reiters with their pistols at the ready were far more effective in the melee: "the Reiters are never so daungerous as when they be mingled with the enemy, for then be they all fire." He pointed that because of the danger of pistols cavalry clashes rarely lasted for a few moments before one side broke, thus good discipline would have been more important than the psychological impact of the lances. In 1632, John Cruso wrote that the main reason so few lances were being employed was that there were so few remaining actually trained in their use. Using the lance required a huge amount of training for both the rider and the horse, especially when talking about the massive, 18 foot lances needed to be effective against infantry armed with pikes. In addition, the lancer needed to be trained how to use his sword, pistols, and lance, while the cuirassier only needed to learn to use his sword and pistols. Cruso also pointed out that Lancers were less flexible, could only attack in a straight line, and were only effective on hard, open ground.
Essentially, a lancer required a significant amount of extra training, and provided a questionable amount of extra utility. I'm not an expert on the Polish Hussars, but essentially it seems to be a case where the Polish lance tradition was able to survive much better than it did in western Europe.
Militaire Instruction for the Cavallrie
The politicke and militarie discourses of the Lord de La Nouue