One weird issue I had with next 13 was radio button groups did not work. The suggested fix from a core next contributor and fb employee was to "Upgrade to a canary release"...

I get that you are building all these new cool features, but that cannot put basic functionality and backwards compatibility at risk. Radio buttons have been around forever, I'd assume that they are being used by tons of websites all ove the place. Yet hydration of SSR radio buttons was not being done properly and so you could not set a default value for your radio button...

This kinda shit is just basic. You can't add new features at the expense of basic functionality.