A myopic and unrealistically narrow perspective on Microsoft IE.
Some admissions of reality have been excluded from Mr. Cartwright's musings.
One, Microsoft Internet Explorer and Edge browsers have suffered substantially more bugs and breakage than Google Chrome and Mozilla Firefox. At least if one goes by results of Browser reliability and security reports from credible organizations.
Two, the author keeps referring to the Microsoft world, which my understanding of his explanation refers almost exclusively to Office365 and onlineMicrosoft applications. This again is inaccurate, since - according to Microsoft, about one third and climbing of their Azure Cloud services are running some distribution of Linux or the FreeBSd operating system (OS) to support Docker Containerization and non-MS applications, that are equally accessible from Chrome, Firefox, Vivaldi, Safari or any other HTML5 browser.
The European Union, including soon exited Britian, many Asian, South American, a few African countries has "officially" adopted the Open Document Format document standard, via Office suites built to that technology specification (Office breaks that compliance) and available via Cloud based versions.
Microsoft, nor IE/Edge play any part in that equation, unless the writer's thinking is restricted to USA alone, that is usual position for many technology writers who extrapolate everything here in USA and from Microsoft as being automatically relevant or indispensible to the rest of the (real) world, which is not space between New York and California.