In a blog post, Microsoft Windows Principal Architect Chris Jackson urged companies to migrate to modern browsers instead of using IE as their default.

“You see, Internet Explorer is a compatibility solution,” Jackson wrote. “We’re not supporting new web standards for it and, while many sites work fine, developers by and large just aren’t testing for Internet Explorer these days. They’re testing on modern browsers.”

Jackson said he sometimes, even to this day, receives queries from enterprise customers about how to ensure all web traffic goes to IE. If most of your sites were originally designed for IE, it might seem easier to use it by default, he acknowledged. But in 2019, that’s not a good decision.

While Microsoft really wants to retire the legacy product once and for all, Jackson said it’s fine to use Internet Explorer for certain enterprise solutions, however even then, it should not be relied on as a main browser. While plenty of companies have made the switch, some professions with lean IT departments, such as healthcare, still have questions about the browser.

Microsoft Edge was introduced as the successor and made its debut with Windows 10. The software maker is working on a Chromium version of Edge that will be available for tests in the next few weeks. The new version of Edge could make a big difference for Internet Explorer holdouts, since businesses will be able to install it on certain older versions of Windows.