Because if it was to continue on, version 4 would not be so serious. They would just know that if it had problems they would be worked out with future installments, but since everyone is acting like "If we don't do it now, it will never be done" about the bugs, is just screaming that thi will be the last version.
Flame me if you want, but this is what ALL people in the emulation world are saying.
And why does everyone get so mad when mentioning the final version? If it is, so what. That is why they would cancel the project. If you quit don't get mad about it.
Lets just all hope for a Open Source.
Because it would make NO SENCE to get this far, and then quit, and restart from the begining.