Why was Hollywood reluctant to convert to sound technology, and what factors ultimately pushed it to do so?

If it ain't broke, don't fix it.It was expensive to convert production and exhibition to sound and the audience was already happy with silent film products, which were easy to export.However, Hollywood converted after witnessing the financial success of The Jazz Singer and discovering that sound technology could cut costs in other ways (e.g., you didn't need to pay for orchestras and accompaniments).