The problem with Hasselblad is that they were open, and then went closed. A lot of people were using Phase backs on H2 cameras back then, and after this move, they could no longer move forward in that direction. Some went to Hasselblad, some stuck with Phase and used another body. No one was happy to lose the option with no warning, especially those who preferred hybrid systems.
*That* is the problem, not simply being closed.