Opinions on viruses

[Nlamr]

In this I am looking more for opinions from more experienced growers than advice as I have seen many varied discussions elsewhere.... Every once in a while I question myself, should I be worried about viruses? Should I test just a select few, or should I go through the great expense of testing them all? Can a virused orchid live a long happy life and just be a carrier? I'm just a hobbyist, my orchids aren't going anywhere, I don't share water (except the vandas) and I sterilize tools and surfaces as best I can, so is it really worth worrying about? What are your thoughts or experiences?