The Last Silent Films

 According to this article, why did Hollywood switch over to "talkies" so fast? Why was 1928 such a pivotal year for silent cinema?

    1928 was a year where both silent and sound films were being shown in theaters, and only a year later, while silent films were still being produced, they were being produced at a way slower rate. 1928 was also a year where actors would split- would they continue on in the industry, and work with sound, or would they quit? The era of "talkies" promised more money and revenue, and the film industry is based on money, of course. Because of this, producers invested all their time into "talkies" rather than silent films.