Mathematical Logic Quarterly / DVMLG (Cambridge University Library)
Protesting profit-oriented policies, the entire editorial board of Mathematical Logic Quarterly (MLQ) resigned from Wiley. Backed by the German logic society DVMLG, the board launched a new Diamond Open Access journal, ZML, with publishing operations technically supported by Cambridge University Library on OJS. The walkout mirrors earlier defections such as Lingua to Glossa, showing that established editorial boards can re-establish a journal on open-source infrastructure without a commercial publisher. A UK/German example of a high-profile journal flip onto OJS.