You are right. From what I saw Linux-based OSs have come a long way. The issue with Linux is when it comes to professional environments, that are not IT-related: There are niche programs that are used in certain professions that were written to work on Windows computers exclusively. They are not availiable for other OSs, because they are not wide spread or popular with non-professionals. Also, Microsoft Office (especially Outlook and Excel) is very dominant within the professional field - up to a point that it can’t be changed easily. All this does not apply to users who use Linux computers outside a professional enviroment, as there are alternatives for popular programs and services already.