That's indeed the main reason: they were horridly expensive.
Absolutely great machines. But way too expensive.
The other thing is that leaf shutters were much preferred in the market segment these things were aimed at.
And that all that automation was not needed by the people who bought Hasselblads (which is why they introduced the 201, but it too was an answer to a problem noone had).
If you are planning to get one, no need to fear problems with the electronics. There are absolutely none (Apart from cameras with electronics always being less durable than cameras without, of course).