Google say that their quest to make websites more mobile friendly impacts mobile search results - https://webmasters.googleblog.com/2016/03/continuing-to-make-web-more-mobile.html
But I am wondering if having a website that is less mobile friendly effects desktop SERPs as well? We require Adobe Flash as a tool for people to upload their images to us but not on the landing pages we're trying to rank. So our landing pages are not as mobile friendly as they could be (which we're looking to improve) but am worried this is effecting desktop search results even though Google do not claim they do.