[Zope] SQLSession works great - ZopeSession is a disaster

Hi, we used SQLSession for some years with success and switched to ZopeSession / CoreSession when we changed to Zope 2.6. At this moment the problems with Sessionmanagement began. I am now at the point thinking about a migration back to SQLSession. My Question now: Does SQLSession reliable work with Zope 2.6 and future releases or is this great / fantastic / best Zope product declared as dead?? regards Harald