I'm entirely on board with this, figuratively but also literally, if given the opportunity. It would be a blast to ride one of these things long distance. As far as cargo goes, I'd like to see a comparison on volume- if it can carry more cargo, it might still out-perform faster cargo planes just for sheer tonnage.
This got me wondering: Are there that many flights that their emissions alone would be problematic (assuming all other forms of emissions are eliminated with EVs and other green energy sources)?