> But full time remote is a disaster for junior engineers.

This is very handwavy.

As a principal engineer, I've worked with junior engineers that have adapted just fine and thrived, even as their first or second job out of college.

But for that to happen, the company's culture has to be willing and able to shift to remote-first and/or fully remote. The more senior people need to role model the way of how to do remote well in a way that counters its (few) disadvantages.

There is definitely a personal component too though. I've also worked with junior engineers that do not work well remotely. But I think that is more personality-based or perhaps maturity-based than seniority-based.