But your mention of "for extra use" would be key here. What type of "use" would that be? Various types of Linux (Ubuntu, etc.) are available for free and can be tested, if that's the way you want to go. In fact, it's a good way, if you're just experimenting with operating systems. On the other hand, if you want to go with the most common right now, with the most compatibility with other systems in the world, then you go with Windows 10 because it will probably be supported the longest.
It's up to you.
Hope this helps.
According to everyone, which operating system should be used for extra use. I am using macbook and want to experience 1 more operating system