I'm honestly curious when that convention would have seeped into my brain; in checking, I only use periods for multi-sentence texts. And I've practically forgot

I'm honestly curious when that convention would have seeped into my brain; in checking, I only use periods for multi-sentence texts. And I've practically forgotten what it felt like to be in my 20s. Even my mother's text messages don't end in periods if they're a single sentence. Bizarre how the conventions of a particular communication medium just seep into your brain.