A friend of mine has a fretted Warwick that has worn flats for over a decade. His bass sounds fantastic and the roundwound secret police have yet to come bash in his knee-caps.
Don't let the narrow-minded hoards that insist flatwounds automatically make any bass a glorified electric washtub bass sully your exploration of all the great string options available. Dozens of different flatwound options available and they all sound different.
Some people like rounds, some like flats, some like tapewounds, etc. The only way you'll figure out what works for you is to try what's out there.
Don't let the narrow-minded hoards that insist flatwounds automatically make any bass a glorified electric washtub bass sully your exploration of all the great string options available. Dozens of different flatwound options available and they all sound different.
Some people like rounds, some like flats, some like tapewounds, etc. The only way you'll figure out what works for you is to try what's out there.