A lot of (mostly non-US) orgs used locked-down managed IT and VMs where IE was still the only allowed browser, until the IE 11 shutdown in 2022, which is recent.
And just for reciprocity, here's Indian Defense Review (5/2025) "These People Never Moved On: They’re Stuck 24 Years in the Past and Have to Use Windows XP" : "Thousands of workers across the US and Europe still depend on a system from 2001. From hospitals to railways, entire operations run on technology long considered obsolete."
https://indiandefencereview.com/these-people-never-moved-on-...