TBH I don't view Fallon as being an untouchable attraction over the next decade, even if it's as simple as an SNL overlay. The broadcast landscape is changing dramatically, and unfortunately I don't think Colbert ending tonight will be the last major last night shift we have before 2030. Video concepts and podcasts have really taken over the online grasp late night had pre-pandemic. Keeping the Tonight Show brand alive remains valuable for NBC right now, but will it in a few years? Race Through New York is at the nine year mark now, and obviously Fallon's personal longevity has been discussed from the start. He's reached a point where Seth Meyers is ahead some nights, so it's not even like Fallon is the golden ambassador for NBCUni he once was years ago.