Talking specifically about Lineage 17.1 - FP2 …
The topic was started by the maintainer of LineageOS on the Fairphone 2. The opening post says
So, the maintainer of LineageOS, he who might be able to fix stuff in it, seems to me to want to collect all the stuff which doesn’t work in this single topic so he has an overview in one place and doesn’t need to unnecessarily roam around in multiple topics.
I think this needs to be taken into account, although I agree that most of the time long topics covering multiple issues are not ideal.