Android ate every other mobile OS excluding iOS, in part because it was OS and close-enough to free for OEMs. I can't even think of a closed-source webserver off-hand. Even the fine people at Redmond had to offer Linux support on Azure. The vast majority of the web runs of FLOSS.
FLOSS wins when working with OEMs. Only with consumers does the new-shiny-proprietary win.
Microsoft IIS? Still about 6% of web servers & in 5th place, according to September 2022 stats. Though that's a huge crash from 2018 when it was the #1 largest share of websites (40%) according to Netcraft.
https://w3techs.com/technologies/overview/web_server
https://news.netcraft.com/archives/2018/08/24/august-2018-we...
Of course free beer is great for OEMs.
That's presumably why my 2016 Civic used Android under the hood instead of QNX. The latter would be faster and more responsive, but Android is free, easy enough to force into the shape Honda needed, and possibly even gave them an easier time finding people familiar with the more inner workings of the OS.