Why are tonsils not removed as frequent anymore?

Tonsils are lymphatic tissue - when working properly, they help combat infection. With several antibiotics that can successfully treat tonsillitis today, most doctors prefer to "heal" the tonsils and leave them in, rather than remove them, if possible. Tonsillectomies are still performed, but only on occasion, where as in the 1940s and 50's, they were routine.