I am also one that falls into the regretfully, yes category. To those that haven’t seen this post from the Microsoft about how and when IE should be used. It could help persuade management to move away from IE and IE support for your users.
Even though we support IE, when IE is used, a banner message is displayed to the users to notifying them that IE is not fully support and it is recommended to use a modern browser, with links to Edge (chromium), Chrome, and Firefox. The more we educate our users and corporate (government) management the faster IE will be a thing of the past.