The best thing about Win10 reaching EOL is not being at the mercy of Windows Update any more. It was by far the biggest risk to having a functioning system.
Windows is such a horrible OS to use when you work in a small company that isn't big enough to have IT to shield you from all the horrible stuff, like in a small studio. Normally I work in Linux, sometimes need to boot Windows just to do some export or something, then goal is to boot into Linux again ASAP. But time and time again fucking Windows forces me to prepping updates when shutting down for next boot, with literally no way around it, even weird terminal incantations can't stop this, nor changes in the registry, it just refuses to shut down without prepping to apply updates on the next boot.
Which means next time I have something to do on Windows that in reality takes ~30 seconds once I'm in, it'll instead take 15 minutes because Windows decides that my time is worth nothing to them.
Add in that I use Windows maybe once a month or something, and every single experience with using Windows for me is this fucked up process of time wasting.
Running an unsupported OS is even more risky, especially with the excessive number of security updates needed while AI finds RCE after RCE.