Seems you don't know about the Olympus (Concorde, if you really don't know about what Bristol did ...) and the rest (Pegasus etc).
I'm sure they'd never have gone along the "Super-duper, frightfully hi-tech carbon fibre" route for one thing (Rolls have had a history of hi-tech (!!!), but have also had problems with compressors, from the Avon (had to go secretly to Armstrong Siddeley - later part of Bristol) up to the RR mods to the Bristol design with the Japanese for the predeccessor to the V2500.
RR's own
PR goes to their heads at times (remember the slogan "Best car in the World" for a beast with leaf spring suspension and other 1930's features - but beautifully built - and that was before "engines" and "automobiles" became separate).
Having failed with the CFRP fan (which was supposed to compensate for the extra weight of the 3-shaft layout) RR then spent oodles of dosh on the hollow titanium blade fabrication to get back some weight. As in the automibile company which also spent a lot to design seals for the "bought-in" GM automatic transmission, becasue "Rolls Royce gearboxes do not ever leak" or special hand-sewn leather gaiters for inter-leaf lubrication of cart springs, forgetting that coil springs don't need greasing ...
I think things have changed since 1971, but they really did drive themselves bankrupt.
And it was said they snatched bristol's in a dawn raid because Bristol was getting too close to SNECMA, with its links to GE, those links going back well pre-WW2 to SNECMA (or a predecessor) building Hercules piston aero engines (remember them, with sleeve-valves, ?
Yers, there's the "Magic of a name" thing, but the silver plating has flaked from time to time, even fairly recently ...