I am announcing 2 twisted releases.
This is a bit more complicated than normal since 19.9.0rc1 was never followed by a non-RC release.
You can see a detailed checklist and discussion of this in #313 .
Relative to 19.9.0rc1, 19.9.0 contains a few readme fixes and the news fragments processed into the news file.
19.9.0 artifacts have been created  and 19.9.0 publishing is being held until after 21.3.0 to avoid a somewhat pointless intermediate step for developers that are using 'the latest non-pre release on PyPI' (presently 19.2.0). No real need for someone to get 19.9.0 now just to see 21.3.0 available next week. The news for 21.3.0 is available for review .
21.3.0rc1 has been published and is open for a week for feedback before 21.3.0 is planned to be released.
There are remaining bugs and important features. But, it took long enough to get to this point that I consider it important to get something out. Several people are waiting patiently . As we find time to design and address the remaining issues, hopefully we can manage more frequent releases.
Please do let me know of any issues you find that are not already documented. Or, if any of the documented ones should really be release blockers. I sure hope we can get this out though. :]
: https://github.com/twisted/towncrier/issues/313 : https://github.com/twisted/towncrier/pull/331#issuecomment-803491163 : https://github.com/twisted/towncrier/blob/21.3.0.rc1/NEWS.rst : https://github.com/twisted/towncrier/issues/269