Why did Frans Hals receive fewer portrait commissions after 1650?

After 1650, Frans Hals received fewer portrait commissions primarily because public taste had shifted toward a more elegant style of portraiture, which had been popularized by Anthony Van Dyck.1

While Hals maintained an impressive reputation and continued to produce masterpieces during his later years, his work—which became increasingly characterized by a somber, tragic tone and a loose, expressive technique—no longer aligned with the prevailing preference for the refined and sophisticated aesthetic associated with Van Dyck. This decline in demand for his specific style contributed to significant financial hardship for the artist, eventually leading to the auctioning of his possessions for debt in 1654.1