NASA is at least verbally sounding more encouraging about the SpaceX
'Load and Go' launch for manned vehicles. This is good because, while
they could do it the other way, there would be a performance hit due
to the propellants having time to warm up. Block 5 has some extra
performance over Block 4, so there may be some headspace there, but
why give it up?


--
"The reasonable man adapts himself to the world; the unreasonable
man persists in trying to adapt the world to himself. Therefore,
all progress depends on the unreasonable man."
--George Bernard Shaw