> So what ends up happening is seniors become more heads down, getting things done, and juniors struggle to get time with more experienced coworkers.

I just replied further down ( https://news.ycombinator.com/item?id=48353154 ) about this. You are entirely right, but it is also something that can largely be mitigated if companies and teams are self aware enough. I am not going to rewrite that entire comment but in addition to what I wrote there any self respecting company over a certain size should still have a junior training process in place that spans at least a year possibly two. Letting individual teams or even individuals figure out how to handle juniors always would give you wildly different results, but being in the office this was often hidden because some juniors would organically find other people for support. If you are not physically in the office you need to make sure they have other check-in moments with each other. Allow for moments where they can meet people outside their teams (knowledge presentations, workshops, etc).

I still think working hybrid (but one day per week imho is often enough) is the sweet spot for many reasons. But overall I mostly think that the FT (as often) is making excuse for things that boil down to "no, the main reason is actually corporate cost savings and refusal to invest in core processes".