@allanfriedman @joshbressers Don't forget the weird sub group of companies offering binary patches for Windows either solving issues the vendor hasn't yet, or providing "non reboot" fixes:
0patch: Operated by Acros Security, 0patch specializes in delivering "micropatches"—small, in-memory fixes for software vulnerabilities. They have addressed various Windows security issues, including the SMBGhost vulnerability, before Microsoft's official patches were released. Additionally, 0patch has extended support for Windows versions beyond their official end-of-life dates by providing security patches for Windows 7 and plans to do the same for Windows 10 after its support ends in October 2025.
https://www.techspot.com/news/103593-windows-10-get-five-extra-years-support-courtesy.html
there's others as well, Shavlik, I can't recall any other names. Also a bunch in the Linux space, like KernelCare.