Having been around working Rocketdyne F-1 engines, my perspective on ‘massive’ is a bit different.
that was a (cough) massive ... the new Russian Fenix will dwarf the F-1. 150 tons to orbit maybe more, 2020 or so if they don’t lose funding. Falcon XX in about the same league at 154 tons.
Humm ... just read that Musk plans on retiring to Mars ...