They are also often examples of Sex Comedy, with the plots driven by attempted adultery and character lechery. Hence, Feydeau can take some of the credit or blame for the English-speaking world's image of France in The Gay '90s and The Edwardian Era as being especially naughty. Feydeau was a man of his time, though, which can lead to a little Values Dissonance for modern readers of some of his plays. But they work, and some of them are still regularly produced today.
Feydeau was a great success in his time, in France and abroad, but enjoyed the Parisian high life that was the setting for many of his plays, which caused him some financial difficulties. He died, with perhaps some vicious irony, of syphilis.