Yeah it depends. For “What’s the best laptop for Linux”, literally just look it up; there’s hundreds of articles, forum threads, Lemmy/Reddit posts, etc discussing this topic. But I don’t think there’s an issue asking for hardware recs if you are explaining a specific use-case. I would say still do an online search first—like some use-cases are quite general, e.g. for music production, for gaming, and so on. And even for the most general cases, I think if your thread is more something like “does anyone else disagree that ThinkPads are good for Linux?” that’s also fine, because it’s actually sharing your opinion and giving something more to go off of than “give me a laptop”.