Plural of Satoshi? Is it Satoshis? Do we add an "s" or not?

The bitcoin community hates, when we talk about bitcoins.
It´s called Bitcoin! Without adding the "s"!
So what about Satoshi/Sat? Plural form is "Sats"? If so, why??
"Stack Sats" is still accurate?
Doesn´t make sense for me.