I have and I can't think of anything worse for developers. Being on the phone all day, group solving problems is a great for the below average to hide within the group.
The entire day on a call with a headset is one aspect. The waste of 3 or more resources trying to solve one problem is another. Changing a solo activity into a group activity means you can never go deep into abstract thought or take the time to pause and reflect. Too many cooks in the kitchen is the old saying goes.
But otherwise, why do you think it’s so bad?