

My guess is that all the major features for Maya 2019 are finished, but QA testing and final release are being held up by Qt. A common first encounter with Qt is when scripting Python dialogs in Maya with the PySide and PyQt modules.) It's used by many CG applications that need to run on Windows, Mac, and Linux. (If you don't know what Qt is, it's is a big software library for writing cross-platform applications. This means it's likely ADSK will want to wait another month for the 5.12.1 point release to get something usable. But the first version of Qt 5.12 was only released last Thursday! Even with the release, there were 500+ more fixes that didn't make it in time for 5.12.0, so much that 5.12.0 is not recommended for shipping on Linux. This is a massive update after 3 years of using a heavily modified version of Qt 5.6. The VFX Reference Platform spec specifies Qt 5.12 for CY2019 software. My guess is that the delayed release this cycle is due to something fairly mundane: Qt 5.12.
