Speaker positions matter, but it isn’t easy.
The example that started this was my getting B&W 804 D3s. In my room, they were the best I tried so I got them. B&W know their speakers, but had the salesman stuck to their recommendation on 50cm from side or rear walls, they would have sounded ok, but not great - and certainly not worth the price.
Moving them an extra 15cm away from anything made them a bit closer together than ideal, and was domestically inconvenient, but suddenly everything (esp stereo & tightness of bass) got clearly better in my house. This is not what happened in the shop audition and it changed what I bought.
The trivial point here is to listen in your own home if you can, but the episode also highlighted that for years I have believed manufacturers and journalists on positioning. If what they said made clear that a speaker wouldn’t work in my house, i didn’t need to consider it. In the light of my B&W experience, i wonder what I have missed - and how unintentionally misleading a lot of guidance on this stuff is.
Does anyone else wonder about that sort of thing?