How fast does stereo tech evolve?

How fast does stereo tech evolve? Will a sound system someone buys today that costs 5k still be worth around 4K 5-6 years down the line? Are advancements quick and drastic?

Only comparison that comes to mind is tech like computers and phones etc where advancements are pretty quick where a 5 year old device is considered veryyy old.

So would a new or year old sound system become quickly dated?