I might be wrong, but to me junior dev are just senior dev in the making, employers know that. The junior dev will continue to exist as long as employers need senior devs.
Now maybe Devs will completely disappear in the near (or far) future, but I don’t think you can remove one if you still need the other.
Work laptop of course, if it was my personal device I wouldn’t even care what they say. I think I’m going to isolate my work laptop from my home network now though.