Why not Windows or Macs?
Ok, let us tackle the problems with Windows and Macs first. Windows, developed by Microsoft Corporation, is the Operating System with the largest market share. However, this doesn’t make it the best when it comes to quality and consistency as it is constantly marred with problems of viruses and malware. Also, the initial investment in a Windows PC is much higher than what a consumer expects to pay. First it is the cost of the hardware itself, then the cost of the license to run Windows, then an Office program, and finally to protect it all, a decent antivirus software. In short, the license may carry an affordable price tag but the expenses finally pile up to burn a large hole in the consumer's pocket. As for computers that come with Windows pre-installed, the cost of antivirus, Office utilities and other non-free programs usually overrides the buyer's budget. Furthermore, the version of Windows provided is usually Home or Business edition, which lacks many features the Ultimate version provides.
Coming to Macintosh computers, they, unlike Microsoft, prefer to sell their software bundled with their own hardware.
Apple claims that their design, feature-set and stability are much superior to any of Microsoft products; even if it comes at a very high price point. Nevertheless, Macs, despite their holier-than-thou attitude towards Windows and Linux, are far from being the perfect computers. Consumers and Microsoft employees frequently complain that Macs are significantly overpriced than a normal laptop/PC. Apple does have many quality programs for its users but most of them are highly priced and are not open source. Furthermore, Apple has gained notoriety for making closed, locked-down Mac exclusive products thus creating a walled garden of their own.
Note: The points mentioned above are not intended to offend any Windows or Mac lovers. I'm merely pointing out that Windows and Macs, contrary to popular belief and marketing claims, are far from being perfect and flawless products.
Why Linux?
After pointing out all the downsides of Windows and Macs, I come to the main point, that is, why should anyone switch to Linux. We all know that it is for geeks, don't we? Besides, how good can an OS be if it completely free and open source? Let's tackle all these questions one by one.
Myth 2 : Linux can’t handle Excel, Word, Powerpoint
Linux can handle all the major file formats when it comes to documents as it comes with a powerful opensource Office suite called Openoffice.org (soon to be replaced by Libreoffice). So, apart from doing all the spreadsheets, presentations, and word processing out of the box, Linux can do tasks like publishing, image editing using only free and open source applications.