I think @drumstick diva means that while a question is being answered somebody asks their own question and then people ignore the original question to ask their own...? For example, maybe in a “none of my eggs hatched” thread somebody might post their own question like “how do I keep my humidity up” and then the attention gets directed to that question and the thread gets “taken over”. I think.

A good example of a GOOD take over would be on a thread I created a very long time ago. My Homemade V.S. Store thread
I never ever get a single alert to remind me to join back into this forum. There are many great posters whom are keeping it alive as I am absent. I think it is wonderful to go back and see all of the additions and contributions. I have so many threads that it is hard to keep up without an activity alert. I have un-watched/reset back to watch/dumped browsers data and re-watched but never one single alert. I use a bookmark to find it.
Without members taking over that thread, it would die and dissipate in my absence from being too spread out.