I don't think that post is saying that. I think that post is warning you that it's immutable once done. If you want to be more flexible in the future and can't

I don't think that post is saying that. I think that post is warning you that it's immutable once done. If you want to be more flexible in the future and can't be sure you won't need to use 4kn/512e disks at some point, yes, use 4kn (or with all SSD storage it gets even messier). But using 512b can be a significant gain on space efficiency for some people.