That’s fair. My UniFi gear has added that in recent updates, though that’s an investment. If your system works for you, that great; stick with it!
But, I would try to find an alternative to Windows 10. Paying for ESU’s would be better spent getting something else. What that might be, I’m not sure.
Extended Security Updates.
I agree with you on throwing out perfectly good hardware. Either you hang on it until it’s useless, or you throw it on eBay and let someone else have it.