I’m the opposite. I see no money value in upgrading.
It would cost my family of four almost $1400 for two weeks to upgrade and another $700 in tips. I’d rather take that $2100 and pay out of pocket for a few favourite restaurants, and pocket the extra money.

As a bonus, you’ve got a few extra quick service meals to eat.
It really does depend on the make up of your party, how long you stay, and what you want to eat. I can see why single people or couples on a short trip might want to upgrade.