Used it the majority of my engineering career. Sun Os before that. Sun OS was Suns version of Linux.
Liked being having the source code in case I needed to make improvements.
My last job they were stuck on Windows. I did that for three years. Twice as hard to make things work. We were using windows 7 and Microsoft supplied a way to modify the kernel. Few users know it existed. PIA but worked. That is until windows 8! That feature went away. Broke the entire system.
My solution was to retire. They had to switch to Linux to continue. $$#_&!!!, Microsoft. 😡🤬
I analyze the email before clicking on anything and forward it to what ever company they claim to be and report the spam so they can take steps on taking it down. Recently there is no return addresses in the email so you cannot identify who sent it. Only recourse is to delete it. Cannot block them either.
Started out using Norton and Mcafee. Claiming my credit my license is expiring and my credit card is no good. Now a bunch of others with the same patterns.