Do I need a 20TB boot drive? No. Do I want it enough to pay $250? Yes, absolutely. I’m running 1TB now and I need to manage my space far more often than I’d like, despite the fact that I keep my multimedia on external mass storage. Also, sometimes the performance of that external HD really is a hindrance. I’d love to just have (almost) everything on my primary volume and never worry about it.
It’s kind of weird how I have less internal storage today than I did 15 years ago. I mean, it’s like 50 times faster, but still.
I’m not super-skeptical about the pricing. This stuff can’t stay expensive forever, and 2027 is still a ways off.