Comment by readthenotes1

"In that time, you get used to huge classes. New functionality? Just add a new method and field to the class"

I guess this is one reason why object-orientation has such a bad reputation.

I once worked at a bank where the OO mentor had taught people that the only object they needed was "Tape" and have them replicate the structure of data on the old spooled tape reels.

The struct of arrays reminds me of this optimization.