Upd - Www.qgis.org 2.8

But for those who have been in the industry for nearly a decade, represents a watershed moment. Code-named "Wroclaw" (after the Polish city where the QGIS developer meeting was held), this release was not just another iteration—it was the first Long Term Release (LTR) .

This is why remains a crucial keyword. Entire organizations were "stranded" on 2.8 because their custom toolbox was never ported to QGIS 3. To this day, some engineering firms keep a Windows 7 virtual machine running QGIS 2.8.9. www.qgis.org 2.8