Do you know what a “cold open” is? Sure you do. Every current sitcom you watch uses it. It’s when the show just begins, no fanfare, no opening titles. Right into the action, because the producers know you’ll change the channel if you have to sit through 30 seconds of the same music every week.
“Cold opens” are like “cold sores”. They spread easily. Saturday Night Live has done cold opens since before you were born. You’re used to it in sitcoms. Hell, you were getting tired of the “typical sitcom theme”, anyway.
That’s why they suck now.