A reboot is a bad idea. The ending was perfect. It's fun to imagine how their lives turn out. Especially Malcolm and Dewey.
I saw a fun post on Reddit with some ideas about what a reboot could look like and it almost changed my mind on the matter. In this writing prompt, Dewey has become very wealthy and built a huge mansion right next to his parent's house. He lives there in secret and never reveals his identity to Hal and Louis.