https://www.wine-staging.com/news/2016-03-21-release-1.9.6.html shmerl: JudasIscariot:
They disabled CSMT because mainline Wine is getting it, and patching for it started conflicting with the main code.
Did WineHQ say this anywhere? Can't seem to find any source on this...
Before talking about the smaller additions, there is another important announcement regarding this release. We are aware that a big group of people uses Wine Staging because of the CSMT (commandstream multithreading) patchset, and we are glad to see that there is again (slow, but steady) progress to include this feature in the development version of Wine. The whole process also has a downside though. Various design goals have been changed during the upstreaming process and we are currently not aware of any fully functional patchset, which provides all CSMT features. So far the multithreading part, which contains the actual performance improvement, is not upstream yet and the remaining patches are geting more and more incompatible. Working around all those problem (which we did in the last releases) is not possible in the long term, and we therefore decided to disable CSMT support in this release. If you depend on this feature, you should not update to Wine Staging 1.9.6. The feature might be available in future versions again, so don't forget to check the release notes.