The company I work for is in the process of replacing jira with an in home grown solution. They ran through a bunch of trial with pretty much every vendor under the sun looking for a replacement for jira, but none of them really sparked joy. Someone rolled their own a year or so ago, and it started gaining adoption, and people liked it enough that the whole company is switching to it.

I don't think that means saas is dead. There is a strong preference to buy instead of building if there is something worth buying.