Speakers are always dependent on the source. Always. Garbage in, garbage out.
But that said, speakers have the greatest difference in sound from design to design and design is a moving target. Driver design has changed some and I think there are drivers available now that were not in the early 90's but that deoesn't mean that there weren't some excellent speakers available then which are still excellent speakers, by any standards, today. Subsequent speaker refinement has been incremental, not earth shaking. FWIW, my favorite speakers were designed in 2004 and possessed a quality in both resolution AND frequency response that did not previously exist (at least I had not heard, or heard about).
Bottom line, if you still love to listen to your Legacy's be happy! If you are not happy, there are lots of viable alternatives.
But that said, speakers have the greatest difference in sound from design to design and design is a moving target. Driver design has changed some and I think there are drivers available now that were not in the early 90's but that deoesn't mean that there weren't some excellent speakers available then which are still excellent speakers, by any standards, today. Subsequent speaker refinement has been incremental, not earth shaking. FWIW, my favorite speakers were designed in 2004 and possessed a quality in both resolution AND frequency response that did not previously exist (at least I had not heard, or heard about).
Bottom line, if you still love to listen to your Legacy's be happy! If you are not happy, there are lots of viable alternatives.