The Wine hackers have produced their second Release Candidate for the upcoming stable release of Wine 5.0. Currently in a code-freeze, this means they will only be doing bug fixes and no big new features will now make it in until the development builds start up again next year for Wine 5.1.
With this release, they noted 36 bug fixes. A few of them older bugs only now being noticed as fixed but there are some recent issues solved with: Batman: Arkham Knight, Magic: The Gathering Arena, Gameforge Client, Plants Vs Zombies and so on. Probably plenty more not yet checked too, going back over older bugs is a herculean task given how much people attempt to run through Wine.
See the release announcement here.
Additionally, Wine Staging also had their own 5.0 RC2 release. Wine Staging is where a lot of the more experimental stuff lands for testing, before entering Wine proper.