Software customers are sometimes making informed decisions, and sometimes basing their decision on building a platform that has a time horizon of "until we get a lot of funding" or "when we get bought by a larger company". In both cases, that is long enough to not worry about whether the SaaS that forms an integral part of the product will last.

I'm not making a value judgement; I'm pointing out that SaaS is often picked for only its short-term benefits.