Who cares what they think of each other, like seriously it's like the old 4chan vs Reddit vs 9gag. Who cares what platform you use. I use 4chan, Reddit, and Lemmy. Each has their own niche and anyone who sticks to one and thinks it is the best is falling to tribalism.
Everyone has their balance between convenience, requirements, and willingness to explore. I'd guess that most Linux users haven't given BSD a fair chance, and further away Plan9 people lament that few people wanted to migrate away from Unix.