I think there is something that you, and many here are forgetting. Joe would have lost one year of eligibility under the 2018 rules. Going with Adrian was the absolute best choice, even in hindsight imo. If we had brought him in and had him sit the sidelines in 2018 there is no way he would have taken the job away from Adrian after the 2018 season. Adrian was on several Heisman watch lists and expectations were through the roof for him. We all know he ended up having a rough 2019 but most QBs would have considering the talent, or lack there of, surrounding the position.
Outside of the potential for a freshman QB to overtake Burrow, there’s also other factors that throw a wrench into a move to Nebraska. OSU can block the transfer outright, and then there’s the Big Ten intraconference transfer rule that may take a year of eligibility from Burrow.
Rule 15.01.5. Intraconference Transfer Rules. B. Post Matriculation. A student-athlete that has signed a tender from a Conference institution and has triggered transfer status per NCAA Bylaw 14.5.2 (conditions affecting transfer status), may not represent an alternate Big Ten institution in intercollegiate athletics competition until the individual has completed one (1) full academic year of residence at the alternate (i.e., certifying) Big Ten institution and shall be charged with the loss of one (1) season of eligibility in all sports.
https://www.landgrantholyland.com/2018/5/9/17332184/joe-burrow-transfer-ohio-state-florida-lsu-nebraska-ohio-cincinnati