I also think that people lose interest because it becomes too much work or even too much money. And unfortunately I think that is what happens with a lot of unwanted animals everyday. I think that as long as that person strives to find a new home for their animal(s) with someone who has prior experience or someone who has done their research and is ready to take on the animal, and is going to give it a good home, then it is probably much better anyway. I wouldn't want to see an animal either suffering because their owner "has lost interest" or being passed on from home to home because people don't understand what they are taking on.

But as of recently, I have seen people losing interest in having a big collection of one type of snake because they want to focus on raising/breeding another type.

For the most part I disagree with it, because my thoughts are that if you take on an animal baby, then you should plan on caring for it for life (or have plans for its life since some animals, I think some tortoises, can live much longer than people). Although I fully understand that life can get in the way and force you to have to rehome an animal. But at the same time, and maybe this isn't what is intended as "loss of interest" but it still kinda fits in this thread, many in the herp community though will take in snakes as a breeding project but not intend to keep it for life, just the babies. This seems to be more widely accepted in herp communities as opposed to cat or dog communities.