There’s nothing handwavy about renormalization, it’s just a way of describing the mathematics which is easier for a human brain to deal with, so we’ve standardised on it.

An unnormalised wave function can show you the relative probability of any given thing, but it makes like easier if you set the scale so that you can read an actual probably straight off it, rather than having to ask “relative to what?”

An experimental capability being kicked out of the kernel, so that it has to settle for being a kernel module or custom forks of the kernel, is absolutely a minor matter

This is a non-issue, being over-reported by people looking for clicks. A minor technical matter being handled by the person ultimately responsible for handling such things