I'm definitely excited to see how the VASIMR tech being developed by Ad Astra pans out, and whether anybody manages to build a functional nuclear thermal rocket

I'm definitely excited to see how the VASIMR tech being developed by Ad Astra pans out, and whether anybody manages to build a functional nuclear thermal rocket. Hopefully the new super-heavy-lift capacity that's expected in the coming decade will help to enable the groups working on those and other designs.