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Only real reason to upgrade is for new technologies/features like ddr4 and so on and compatibility with newer devices like usb type c. Best bet is just wait to see what ryzen offers if not to just lower intel's prices abit hopefully.
You can buy adapters though. You'd also get a decent return on selling your setup so ultimately it depends what you want and/or need compared to what you have. My platform is so old that if I updated now I'd get:And onboard PCI-E M.2, which i would like 2 of.
You can buy adapters though.
100% wait for Ryzen before doing anything. Even then you probably don't need an upgrade.