Ubuntu 22.10 gets security updates until 20 July 2023 after which your system won't receive security fixes & may become a security risk any day after it.
The warning notice of the EOL is already out (being published about six weeks prior to EOL), one such notice being https://fridge.ubuntu.com/2023/06/14/ubuntu-22-10-kinetic-kudu-reaches-end-of-life-on-july-20-2023/ which states
Ubuntu announced its 22.10 (Kinetic Kudu) release almost 9 months ago, on October 20, 2022, and its support period is now nearing its end. Ubuntu 22.10 will reach end of life on July 20, 2023.
If you use your system offline, then security is less of a concern and you can ignore the EOL.
If however you use your system online (connected to the internet), then you're putting yourself, your data, and others around you at risk using an unsupported system that isn't patched for security flaws.
If you're capable of monitoring, and backporting those security patches yourself too, you could also keep using an EOL release, but that's a pretty big burden you'll be taking on.
It's not about instability as much as security.
FYI: Ubuntu 23.04 (lunar) has been stable for some time now; reaching that point when it switched from beta or RC to a released product.