I still use a lot of Saas because it is not trivial to host and run an open source app.

For example, if I need Postiz to run I need a server and to configure and maintain a lot of services and dependancies:

NX (Monorepo) NextJS (React) NestJS Prisma (Default to PostgreSQL) Redis (BullMQ) Resend (email notifications) Postiz

I use mailchimp, which is not cheap. But if I want to run Mautic, I need a linux server, with an http server and a database running. It as also a cost in money and time.

I am a single man shop, so I don't want a software to take me extra time when something is broken (or to give 4 hours of my time to install and run a clone of mailchimp).