I've been very active on another printer forum, and at one time there were also calls there for re-organizing when new models came out. But it's a LOT of trouble for the forum administration (if it's even possible to move existing posts into new categories, which I doubt!). We never did it on that forum.
Like Joan, I simply use the feature to "look at new posts".
But if you want to dig out existing answers, it's the classic "filing" problem. Hercule Poirot's faithful secretary Miss Lemon developed a system that worked wonderfully for her to keep track of his correspondence, but the system was entirely opaque to anyone else on the planet.
Or to put it another way, if you have a concern about first-layer adhesion, that question may - or may not - be specific to the model printer you have. Every 3D printer on the planet, regardless of brand or model, has some issue with first layer adhesion. On the other hand, using the PINDA probe and the "Live Z" settings correctly is quite specific to the MK3. So if a MK3 user poses a question about first layer adhesion and the real answer for that specific questioner turns out to be surface preparation or a bad batch of filament - is that a MK3 question or a generic first-layer question? An ideal filing system would cross-reference, but who would administer that and how?
Essentially, the correct answer is to learn to use the Search feature.
HOWEVER - and this is my suggestion to the forum administration - the other 3D printer forum that I referred to has enabled an "Advanced Search" as well as the generic search. Advanced Search allows you to formulate a search that includes not only keywords, but also authors, date ranges, and so on. And you can restrict your results to cases where the keyword is in the topic title, or in the body of the post. And there are other filters too to help you zero in on what you want.
I suspect that the underlying software running this forum and the other forum is the same: phpBB, so the Advanced Search feature should be available.