There are many ways to attach prints to boards. Several of those methods will look great for years. But "years" is not the same as archival. Archival refers to centuries. That is why you should investigate and use methods that are tested under advanced aging conditions by people like those at the Wilhem Institute and George Eastman House. These are people that have PhD's in document preservation/conservation. They test new materials constantly, yet they still recommend the same methods. Are there new materials that pass? Yes, some new silicone based adhesives, but they are very expensive for the home framer.

If you are not concerned about true longevity, then mount however you want. I have before for temporary installations, but for archival mounting I drymount or use photo corners, I process and wash my prints to ANSI standards for archival longevity, and I only use 100% rag boards.