That's overly dramatic. I don't think a new Macbook Air today is a worse value proposition than some Mac from 35 years ago. I just checked Apple prices from 1991:
- Mac Classic II, the slowest of the bunch, $1.900, or about $4.661 today
- Quadra 900, the fastest model in 1991, was $7.200 ($17.663 today)
- PowerBook 170 was $4600 ($11.285)