Last fall, Microsoft updated the end-of-life statements for Microsoft App-V with a date of April 2026. You can see the current statement at this link: MDOP support extended – Microsoft Lifecycle | Microsoft Learn
Microsoft has never, to my knowledge, adequately explained why App-V has to go away. However, nothing lasts forever, and it has been a good run — …

PsfTooling is the free tool to work in conjunction with the Microsoft MSIX Packaging Tool.
TMEditX is the licensed and more capable tool for fixing up MSIX packages since it doesn’t have to depend on the Microsoft MSIX Packaging Tool to create the final package.
The Package Support Framework (PSF) was originally an open-source project to help Win32/DotNet applications run when inside an MSIX Container. TMurgent has taken up the support for the PSF in our own fork 