I am a Linux user since 2007. I started using it mostly to run mathematical software and write mathematical texts. Now I use it for everything.
I have learned a lot trying to compile things that are not found on the usual repositories, and trying to fix things that don't work for me.
I have installed Ubuntu in dual boot settings in BIOS and UEFI environments many many times, either in computers I have owned or on friends/students/family computers. I am always ready with a usb stick loaded with a live Ubuntu session just in case someone wants to give Ubuntu a try.