In its post, Microsoft lists the reasons to update anyways, including speed, usability, security and third-party developer support. "Protection against malicious software increased from 69% on Internet Explorer 8 in 2009 to over 99% on Internet Explorer 11.," adds the company, a huge difference.
If you are unsure how to upgrade, Microsoft also created a few sites to help with the migration, including one for consumers, one for enterprise and one for developers.
Read more or get updated here.