I am working on a SaaS for real estate agents. Customers get their own tenanted database and web front-end with some fancy front-end tools like geospatial searching to keep customers attracted to said customer's portfolio. I have a paying customer who's been using a 1.0 version for more than a decade now. I don't know whether I got lucky or there's a legitimate market for v2.0 out there. I am building it with boring tech as it's a boring product. I guess I should get back to building it.