It does help juniors shine. For example, it's far easier for a new comer to understand an old code base with a capable LLM now. It's easier to get unstuck because an LLM can spot a junior's mistake faster than the junior can go ask a senior.

The problem is that seniors are even more powerful with LLMs. They can do even more, faster. So companies don't have to hire as many juniors to do the same amount of work. Add in ZIRP ending and tariff uncertainty, companies just don't invest in as many junior people as before.