This reminds me a bit of the gaming industry. In most AAA game studios, junior openings are very rare or simply non existent. Companies expect you to learn the ropes elsewhere and only show up when you're experienced.
As long as there other companies scooping up the juniors (which we cannot assume will happen), this could be sustainable.
As long as there other companies scooping up the juniors (which we cannot assume will happen), this could be sustainable.