The author would do well to look up SGML; Markdown is fundamentally about sugaring the syntax for tag-oriented markup and is defined as a superset of HTML, so mistaking it for something like TeX or Word really demonstrates a failure to engage with Markdown per se. I suppose that the author can be forgiven somewhat, considering that they are talking to writers, but it's yet another example of how writers really only do research up to the point where they can emit a plausible article and get paid.
It’s worth noting that Microsoft bought PowerPoint, GitHub, LinkedIn, and many other things—but it did in fact create Word and Excel. Microsoft is, in essence, a sales company. It’s not too great at designing software.
So close to a real insight! The correct lesson is that Microsoft, like Blizzard, is skilled at imitating what's popular in the market; like magpies, they don't need to have a culture of software design as long as they have a culture of software sales. In particular, Microsoft didn't create Word or Excel, but ripped off WordPerfect and Lotus 1-2-3.
You need SRE concepts. First, if you break it then you fix it; in a system where anybody can make a change, it's the changer's responsibility to meet service objectives. Second, if your boss doesn't find that acceptable then they need to appoint a service owner and ensure that only the owner can make changes; if the owner breaks it then the owner fixes it. Third, no more than half of your time should ever be spent fixing things; if something is constantly broken then call a Code Yellow or Code Red, tell your service users that you cannot meet your service levels, and stop working on new features until the service is stable again.
Under no circumstances, ever, should anybody stay late. There should only be normal business hours, which are best-effort, and an on-call rotation which is planned two months in advance. Also, everybody on call should be paid hourly minimum wage on top of salary for their time.