If the designers of Unix had seen the light of CSS, they wouldn’t have bothered with shells and file descriptors and C and Awk and all that composable flotsam. They’d just created a single program, call it the “Central Software System”, and defined thousands of properties that let you control its state machine to produce the output you need. Presto! The perfect computer. If for some reason someone needs a new kind of…
Did the designers of Unix also have to ensure compatibility with billions of devices connected worldwide running different software stacks? Also as mentioned in the linked article the masonry layout is already possible with JS, no decades-long committee process needed. It's just about standardizing something frequently used.
Billions of connected devices worldwide do indeed run on *nix with a mad variety stacked on top.