Where I live the auxiliary bishops are busy doing confirmations, special masses, etc...
The reason I think it is argued to be occurring is to ease transitions from priest to bishop and so on. But, that is flawed. Because, the sacraments confer sufficient grace. If a diocese is too large for one bishop to shepherd it, then the size needs to be changed. Because, this concept of having multiple assigned bishops to a diocese seems faulty, and inline with collegiality. And we think collegiality came out of nowhere. If it is a problem, and it is, then you not only have to reject it, but you have to reject its near occasions, especially when they are not traditionally traced back to the deposit of the faith/the apostles.