Yes, totally,with examples and references.

But there's something existential there maybe?

NASA says, any time you make a program that has a new 'launch vehicle' (aka architecture) - the whole project is the 'launch vehicle'.

'Oh, you want use a new architecture? Welcome to the cesspit of hallucination!'

Basically, there's a lot more complexity than we might imagine 'hidden in the nothingness' of he unknown.

Pick a 'known off-the-shelf launch vehicle' first ... then you design the landing craft