Older speakers can sound very good but I think that today’s speakers outperform them (sound better). Of course paying more or having more drivers or more exotic materials or design doesn’t guarantee better sound. It’s all in getting it right for your system and your ears.
Also, people do get burned out on the constant stream of New! and Better! gear that shows up month after month and the diminishing returns as you spend more for each upgrade. You have to know when to quit chasing better sound and just enjoy what you already have.
So, yes it's worth it, but you can get carried away by the hype and end up an audio burn out.