Alle responds to: "Is there such a thing as too much dialogue?"
A quick note and a short-short-short video.
If you write primarily in dialogue, you are in good company. Virginia Woolf’s The Waves pops to mind. Light in August, Confederacy of Dunces, Kiss of the Spider Woman (William Faulkner, John Kennedy Toole, and Manuel Puig, respectively).
However, beware the common mistake of using dialogue to give the reader information to the reader. Conveying info happens best in narration.
If you feel you have too much dialogue, you can replace any that serves primarily as information with narration.
I love lots of dialogue in a book. Having a first person narrator gives tremendous meaning to "The Great Gatsby," "Catcher in the Rye," and Shirley Jackson's remarkable "I Have Always Lived in the Castle." Thank you for an interesting reflection.