They have distinct uses and cultures. I use both. Destroying an outlet for a culture leads to migrants and discord at the new host.
This was demonstrated repeatedly when moot would attempt to delete a problem board like /b/ or /pol/ (diffusing that culture to other boards) or when digg would make a significant change causing an influx of migrants to Reddit.
I doubt they would come here though. If 4chan were to disappear entirely, most users would end up going to 8chan. Voting sites are not compatible with the provocative nature of image board cultures.
