There is much more than Windows & Mac.
For decades Microsoft's Windows & Apple's Mac OS have reigned supreme on our computers. But as we are beginning to see the demerits of both these OS in terms of flexibility, features and monopolistic products being sold to consumers against their needs & wants, the shift has somewhat been shifting to the third alternative - Linux.
In all honesty, Linux has been there since the beginning and has continued to reign supreme against everything. While only now is Linux family coming into light to the consumers but truth is, Linux powers most of the world's servers including the ones whose OS you are probably using now.
There was a time when Linux based OSes were confusing & a mess. It required advanced knowledge and the will to spend hours to solve an issue which was quite plenty - from hardware to driver compatibility. Fast forward to today though and I would say Linux based systems are now more stable & mature than Windows & Mac. Sure, proprietary software like Adobe's suite and the likes are either not available or very limited in capabilities but that hasn't stopped it from taking the market share. Linux is slowly becoming the worthy competitor it always aspired to and with that its also pushing the boundary of open-source products.
There is just no denying the fact that Elementary OS is one of the most beautiful Linux distribution on this planet. And it is also the most beautiful Ubuntu based distribution (another post on these distribution & desktop environment stuff). The team behind elementary is a small one but their work & vision is way grand. Aesthetics is always the first consideration in any changes or features they add and they give very minute attention to all detail. Privacy is also a big part of the entire OS which is why they have a pay-what-you-want model to support them. Elementary also has one of the world's most unique payment supported app store. You have to experience it first hand before making a decision.
For those of you who dearly miss the Windows XP & 7 days, this is the OS for you. It is also based on Ubuntu so there is absolutely no need for any worries as most Linux apps are first-party supported. Zorin has a very similar look to Windows OS and even supports various windows options like right-click context menu. Apart from that Zorin also has a lite edition for low-powered computers and a paid & business edition for additional support and maintenance.
This is the most beautiful operating system on the planet. If you don't agree with me then I will definitely say that you have a poor taste for UI & UX. Deepin is also built upon Ubuntu but it has its own first-party applications for almost a lot of functionality. There is even a native system wide dark mode! The only downside (which many people consider) is that the team behind Deepin development are seated in China. But I would go on to say that there is absolutely nothing to fear because the Deepin Source code is open and subject to a lot of scrutiny by many in the tech community.
If Ubuntu & Arch Linux had a child then that would be Manjaro although, I am really understating things here. Manjaro is based on Arch and intends to provide a more user-friendly and novice level experience since Arch is meant for the most advanced of Linux users those who really know everything about their system and their own wants. But the better side to this is arch software repository is very stable unlike Ubuntu's and is tried and tested thoroughly. Very clean look similar to Gnome although there are other desktop environment available.
When Ubuntu dropped its default Unity Desktop and continuum project, many in the Linux community were let off and that included OEMs like System76 who ship their laptops using Ubuntu. So, soon after the announcement, they began developing their own OS which has now turned out beautifully with a focus on developers. Both the developers of Pop! and Elementary also co-ordinate on a variety of development activities too!