I switched to Linux 15 years ago and I work in the legal industry as a computer guy, so I’ve been trying. The main obstacle in my experience has been liability insurance; if an entity like a small law firm uses Linux instead of Windows, their liability insurance rates increase; with Linux and other FOSS software, there is no deep-pocketed corporation to sue if a technical failure costs you money. Recent changes to Swiss law might help convince insurance companies that Linux is genuinely better enough that this will change, but insurance companies are the heart of all that is corporate and conservative, and famously hard to sway without mountains of evidence gathered on their terms by their people. Microsoft products are defective by design because institutions that only care about the bottom line do not want their users empowered.

I recommend Q4OS if you have an older machine; I learned Linux on Ubuntu because it’s popular, but realized over time that having a huge community means there are a lot of clueless know-it-alls giving bad advice to noobs. Q4OS is big enough to be supported, and the focus on stability and keeping old machines running makes it friendly to casuals and oldnoobs who just want to keep using the hardware they’ve got. There’s an .exe installer that will let you plunk it down into your PC without losing anything other than hard drive space.