In earlier releases they bumped the version of frostbite to “frostbite 2” etc, but now I don’t see these big announcements so maybe it’s more a slow evolution now and not huge releases? There are certainly new engine features vs previous releases, but I haven’t seen if they call it a new “version”.
since EA doesn't seem to be in the business of selling their engine to other companies, they don't really need to make big announcements with dazzling preview videos
They did toot the horn with “now with Frostbite 2!” before. I think maybe it stopped being iterated on that way and just became a living codebase that their internal projects consume or fork as needed.