Even if Groovy 3 had its first beta tomorrow, it would take several months for it to become the new 3.0. That has been the case for every Groovy version with a beta and especially for a version with so many changes as 3.0. Also the bigger the changes in 3.0 the longer there will be a Groovy 2.x. You can't expect to have 2.x maintained for, for example a year and have only bugfix versions coming out.