From experience I have noticed all things go in cycles. Diseases mutate, change to something else, or go to another host more desirable host be it plant or humans.
At first I would not buy any new hostas from anyone until it worked itself out and there were less hostas out there that had the virus. It has been 8 years since I purchased or traded hostas. Last year I started picking up and ordering them again as I saw something that caught my eye.
I have an advantage of having a lot of land so I can add the new hostas far from my original stock. I have 3+ acres. But there is no guarantee. But gardening for me has never been a guarantee. Gardening for me has always been stepping out and taking a chance. So I am chancing that the virus is not as wide spread as it was 5 years ago.
If I see a hosta at HD, Lowes, My local nursery, and it looks healthy I am buying the plant and go with my gardening philosophy of chance. The chance I take could make a beautiful garden of hostas that I might not have had if I had hide in fear of what if.