I fail to see the real world benefit of this approach. Replacing pull requests with pair programming doesn’t make adding features to the main line necessarily

I fail to see the real world benefit of this approach. Replacing pull requests with pair programming doesn’t make adding features to the main line necessarily faster. Review still happens, just synchronously, and you have two people working full time on the same thing, instead of one. Personally, I have never worked in an environment where a few hours delay in reviewing a pull request, was such a big of a deal. It also seems to disregard the fact that continuous testing can and does happen, because a feature branch may run against all the usual test fixtures, e.g. plan branches in Bamboo work for this.