Why a methodology at all
Ask a capable model about a category twice and you get two plausible answers that disagree in ways you cannot attribute to the market. That is fine for orientation. It is not something to build a positioning decision on, and it is not something to defend in front of a client.
A methodology fixes the parts that should not move: how scope is resolved, which surfaces count as evidence for which kind of claim, which dimensions the landscape is read on, and what has to be cited before something is stated. Everything else is allowed to change, because everything else is the market.
That is what makes the research re-runnable: the same category, six months later, read the same way - so the difference between the two reports is a signal rather than noise.