Earlier quoted context omitted.
I've been running Linux on all of my home machines for many years, including an HTPC, and I've yet to have an update break anything. Should we trust your anecdote, because it has more words, or mine, because it mentions more than one computer?
Really? Anything? It's not that I don't believe Linux is that reliable. I use it daily. I don't believe any software is that reliable. Maybe you're not using it?
To answer your questions- Linux is my primary OS, at work and at home. I don't recall every single issue, especially way-back, but traditionally, I create problems by doing something stupid.
Maybe I'm just lucky with updates, but I stick to popular distros, and I specifically seek out Linux-friendly hardware. Others surely have a different experience. It just felt like OP was painting with too broad a stroke; their statement was valid in 2003, but not so much these days.