The Case of the Evolving Polka Dots

We noticed back in the 80s, polka dots were larger, comfortably apart, and had more area to roll around.
Polkadot Shirt: RM25
from Clothes On Line

Vintage Jingga Blouse: RM25
from The Chaos Closet

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But over generations, that has changed. These beloved polka dots are smaller, tighter and have less area to move!

Grey Button-down Shirt: RM30
from Cherry Junk

Patricia the Polkadot Frock: RM20
from 10 Things Preloved!

Hmmmm... mysterious dots... any thoughts?