ML advancements wouldn't have been possible without the extreme progress in hardware. It's not a hardware vs software thing, rather it's a function of demand. The business model of space tourism in general was always dubious.
Although in case of SS2 in particular, it also got delayed by the experimental nature of its hybrid engine (they changed fuels and redesigned it several times) as well as their approach to safety (2014 disaster).
Although in case of SS2 in particular, it also got delayed by the experimental nature of its hybrid engine (they changed fuels and redesigned it several times) as well as their approach to safety (2014 disaster).