I think cast iron frying pans are an even more emblematic example of what you're describing. It's a four thousand year old product with no moving parts that's long been mastered, but over the past 15 years they've transitioned into a hobby item with ever-more-expensive niche vendors (Finex, Butter Pat, etc.) selling increasingly souped up versions that fry an egg almost indistinguishably from a basic, well-seasoned model.

Meanwhile there's another subset of hobbyists chasing esoteric vintage cast iron frying pans, often claiming the modern ones can never be as good.