The kind that needs to maintain their users’ access to lazy shitty vendors who only develop their sites for the browser with the largest market share.
Half the vendors we use webapps/websites from jumped to Chrome when IE was dying, the other held on to IE kicking and screaming until forced out, then jumped to Chrome. They aren’t going to spend the resources to ensure cross compatability unless they have significant financial incentive to, and they don’t. And IT isn’t going to tell the business side to forget about getting work done until they find a better vendor just because IT wants to make a stand on browser vendors.