I absolutely hate "I know you're busy so I'll keep this short"
It could have been a sentence shorter without that.
I may be in the minority but I don't really care if a company has done their research as so much of it now is AI telling them what we do.
I'd be much more receptive to an email saying:
"Hey Ross, we do XYZ, worth a chat?"
That and people starting emails with just "Ross,"
No Hey, no hello. Makes me feel like I'm back in school