"Brian Gaff" wrote in
. uk:

I just wondered with all the talk of a new vehicle for taking people
into space, whether the SSTO ideas have all been shelved in favour of
good old multi stage conventional boosters?

Seems that way, without some serious developments in propulsion
and structural technology. A fully reusable two-stager ought to
be relatively easy; work on the SSTO later on when the money's
flowing.

--Damon