My Taylor and Larrivee guitars I have been touring with for some time are good all-purpose instruments. If I were playing only old blues tunes, I might get an old Gibson, or if I played only Celtic instrumental music, I might be tempted to put a pickup in my little grand concert Larrivee LS-05, which is awful at bluegrass and blues. If I wanted to play Bluegrass I would likely play a Martin, Gallagher or Collings. My 1974 Gallagher is an astonishing Bluegrass guitar, and you can compete in volume with a banjo, but you have to play it hard to make it sound good. It does not respond well to gentle, bare finger playing, and is not much good for folk and celtic music.
Some guitars respond very differently than others when played at different volumes.
If you play quietly in the living room, you can get great pleasure from a guitar that you could never use effectively on stage. Secondly, the 1990's is an extraordinary time in history to buy a good guitar. You could swing a dead cat in a lot of music stores and not hit a bad guitar. They have improved their intonation, and shaped their necks better, and added truss rods, for example. In the past, there have been times when the high, middle, or low part of the spectrum were deficient, but not now.