Linux is dead?? Hmm tell that to the thousands of companies around the world who use it for servers and even workstations or other platforms. Just because it doesn't play videogames very well doesn't mean it's a dead OS..
and If it was dead it wouldn't be used on the most popular smartphones... Android is Linux just with a bunch of the stuff ripped out. If you have a rooted android device can easily install BusyBox and then from there you could actually install Ubuntu if you wanted ON YOUR PHONE.
The world would be WAY harder without Linux. Windows can do the same stuff sure but not nearly as efficient or as secure even and no not saying Linux is unhackable but deffo a lot easier to harden since you control what's running software/service wise etc... Microsoft on the other hand lol yea gl.