The phrase "more old-school" refers to something that is traditional or conventional. In contrast, its antonyms include modern, innovative, groundbreaking, and avant-garde. These words describe concepts that are new or cutting-edge. The opposite of more old-school can also be expressed using words such as unconventional, revolutionary, radical, or experimental. These terms indicate that something is new, different, or outside the norm. By using antonyms to "more old-school," you can easily convey a message of progress, change, or advancement, highlighting the latest and greatest trends, ideas, and technologies.