It is a failed experiment for sure that made clear that forks are usually not going to work out.
It really depends on the reasoning behind any fork whether it will be successful or not.
Not all forks are experiments though it has to be accepted BCH was designed to take over BTC but it failed.
True, I was particularly referring to forks where a single person or minority want to take over control for the sake of enriching themselves. That's what forks are about most of the time.