The concept of super-perfect competition is being introduced exactly because exit, or switching industries/jobs/etc, really isn’t free and often is seen by people as prohibitively expensive on both sides.
As for the rest, I’m basically giving up trying to explain further to those raising objections, because it is not central to what happens later in the sequence that it be settled—I hope that once we’re done, people will see what I was going for and the disagreements will mostly dissolve. If they don’t, so be it, but it’s not worth exploring further.
The concept of super-perfect competition is being introduced exactly because exit, or switching industries/jobs/etc, really isn’t free and often is seen by people as prohibitively expensive on both sides.
As for the rest, I’m basically giving up trying to explain further to those raising objections, because it is not central to what happens later in the sequence that it be settled—I hope that once we’re done, people will see what I was going for and the disagreements will mostly dissolve. If they don’t, so be it, but it’s not worth exploring further.