FH is not really vaporware. It consists of 3 cores, which are fully flight tested. These are tied together via plumbing that is software controlled. Well, that part is fully tested as well. Remember those 6-12x where spacex announced louder than normal testing? Those were FH testing. What remains to test can only be tested in flight, which is the side separation. OTOH, explosive bolts are well known and tested. Iow, slim chance of issue there. What is holding back FH testing is that spacex is focused on stage recovery, along with dragon2 and that Kennedy needs to be modified for FH.
so, u can claim that it is vaporware, but, Russia, Europe, China, japan, american, and Indian launch groups say that it is close enough to reality that they can not compete. And I will trust their opinion, over yours.