You are funny.
Samsung isn't the first after Apple to get rid of the headphone jack. Other manufacturer's have.
I think they see that people don't really need the headphone jack with Android audio and Bluetooth devices easily and readily available. I even found a bluetooth Aux adaptor at Walmart for $20. Bluetooth headphones can last 10 hours and charge quickly, and found for around $20 at Walmart with decent sound. I'm not talking about those who really want excellent audio, just regular everyday people who just want decent sound. Better earpieces are available if they want those as well.
IF and only if you really need the headphone jack because no other options work for you, then yes, passing on a phone without one will be a no brainer, but finding a decent one may be a bit hard. Don't even think of getting a Note 10, no matter the trade in and bonus'. Show your contempt for that by not getting one. And let Samsung know why.
Previously it was the S series like the Notes and now it's the Notes like the S series. I think they really wanted to get them all the same, maybe on a different cycle so they always have a new phone out. When someone comes to a phone store, they may want to see the newest phones. Samsung will always have a "best" phone available within 6 months of release. One that can compete with the iPhones and every other major phone out there.
That said, I'm tempted to get one now, but Tmobile has a big down payment for the new more expensive phones for my plan. Last year I waited and after a few weeks, it went down in price and no down payment. Maybe I'll just pop on over to one of the many Tmobile stores on release date just to look...