The original comment was saying that Google is able to perform anti-competitively because they control the most popular browser.
The followup (which I responded to) is saying that the existence of Windows as the most popular OS, and Microsoft’s control over the default browser there, mitigates this anti-competitive potential.
The fact that Windows is not the most popular OS (and that, in fact, the most popular OS is controlled by Google) undermines that argument.
Linux is not the most popular OS in any context that includes doing searches with the thing, unless you include Android, but Android just uses Linux for the kernel mostly, and an OS is more than a kernel.
I’m not clear on what they meant by Linux. But if we use a definition of “Linux OS” that includes Android and is restricted to devices which people typically use to perform searches (aka consumer devices) (since that was the original topic), then Linux is mostly Android and it is a kind of pointless distinction to make.
If we want to use some definition of Linux that precludes Android, and covers all devices that use the Linux kernel, then we have a bunch of servers, streaming boxes, smart lightbulbs, whatever.
If we want to use a definition which is, like, what I think everyone means when they say Linux in the context of market share: GNU/Linux or BusyBox/other/Linux (I was hoping to avoid the GNU/Linux meme, but here we are), then that doesn’t have much market share.