Re: "if the shit does hit the fan"
The great thing about much open-source software is that there's no big deal about rescuing data if shit should meet fan. Data is usually in a form that can be recovered, and reinstalling an open-source application is generally a doddle.
Compare this with Office 2016 where reinstallation following some hiccup takes hours, followed by the hoops required to convince MS that you are entitled to perform the reinstallation and activate the software. Oh, and has one ever had to use the Inbox Repair Tool?