> Before smartphones/autocorrect/dictation it was worse.

Not sure I agree. I remember e-mails being capitalized and punctuated.

It's not so much typos and laziness as much as incomplete thoughts and distraction. Communication as a whole has devolved from an e-mail with a complete thought and some details to a text or chat message without capitalization, punctuation or context.

The lack of capitalization and punctuation are just a tell to me that the sender didn't put thought into it.

I can't tell you how many times I get a chat message asking a question. I in return ask questions about context, and explain why I'm asking. Then the original sender gets annoyed and provides context. Then I ask more questions. Then the original sender gets quiet. Then I get an invite to a meeting to discuss with a wider audience.