Let's say you find a year old discussion, you don't bother to read 120 pages, so you just ask your question at the end. If you're lucky enough not to be in a forum that won't flame you for necroing and not searching, you're given a link to a page. You visit that page but don't find the answer. Then ask again. Maybe this time you get a correct link, or maybe you get flamed this time.

See how it's easy to make hypotheticals? Not to disrespect your preferences, but this approach is downright inane. What you'e describing is working despite the software, not because of it. As others mentioned in this thread, you get the exact opposite reactions to another forum about automobiles.

You know what is superior to this? Having a lemmy community about this one motorcycle model, with an FAQ or wiki on the side. People can ask a question as a new thread, and guess what, people can link them to a previously answered thread, just like they would link them to a specific page in your gigathread. Nothing functionally changes here. The lack of threading or sorting by new comments doesn't change the experience. It's the willingness to be nice to newbies that matters.

What you're describing is simply changing a lemmy community into a single thread in a bbforum. It is an objectively worse scenario.

In lemmy you start with a generic topic. Say, automobiles. If it starts getting too busy, you start two new communities, cars and motorcycles, if those get too busy, you expand to brands and models. Each of them nicely organized and easily searchable by titles.

What I see here is a community that coalesced around an old forum software and did the best it could. Unlike most others, it happened to have the right people to make the best of it and find a working system with what they got. But again, it's not the software, it's the people, which is proven by so many similar communities in similar software just failing miserable instead.

I would argue that this community would work much better with a software much better suited for it.