A point that used to be made a lot in copyright wars discussions a decade ago was that most "old fashioned" professions (like plumber, carpenter, architect, etc.) only get paid once, not every time someone uses their product, whereas creators of digital goods somehow are entitled to get money every time someone uses their creation. Super star musicians and software engineers making obscene amounts of money is a direct result of this.
The ignored corollary is that the market for these products will get saturated much more quickly, and thus the product needs to change to stay relevant. Plus there's a low(ish) bar to entry.
How long has a quality carpentry been sold now? Cost of entry is also relatively stable.
Music styles change every decade now and it is speeding up as marginal costs of entry fall. Likely similar with other entertainment, which is why every entertainment corporation is now looking for lock-in.
