Microsoft has now pushed out the KB5019959 (internal versions 19042.2251, 19043.2251, 19044.2251, 19045.2251) update for Win10 users. Microsoft does not provide any feature updates, only “resolves security issues with the Windows operating system”.
"After November 15, 2022, there will no longer be an optional non-security release (called a "C" or preview release) for Windows 10 versions 21H1, 21H2, and supported versions of Windows 10 version 20H2. These editions will continue to receive security updates (called "B" editions). However, all versions of Windows 10, version 21H1, will end service on December 13, 2022." Windows 10, version 22H2 will continue to receive security updates and optional releases."
"All versions of Windows 10, and version 21H1 will end service on December 13, 2022. after December 13, 2022, these devices will not receive monthly security and quality updates. These updates include protection against the latest security threats."
"Due to minimal operations during the holiday season and the upcoming Western New Year, the December 2022 preview release (referred to as the "C" version) will have a monthly security release in December 2022 referred to as the "B" version (). Normal monthly service will resume in January 2023."
"As part of the February 2023 Windows Security Update ("B" release) scheduled for February 14, 2023, the discontinued, unsupported Internet Explorer 11 desktop application will be permanently shut down."
In terms of known issues, Microsoft only mentioned one issue with custom ISO images.