Nice pictures Diane.
There are exceptions, but 99% of the time it's a win win. Very supportive and put the newbie before own needs. Some, not all. It takes years of breeding to get something in your pedigree worth showing. Most people love having a co-ownership, the stories about the CA and US breeders would make you want it.
For any negative there are plenty of of positives.
Considering some dogs don't reach full maturity for three plus years it would be impossible for all breeders to know what dogs are the best every time. Coat in one line comes early, another it's late. Then to have to place liter upon liter, or awaiting full maturity to see if you can show how many yt's?
Did I paint a bad photo for you?