I remember Flowise app being well-intended but bad. I evaluated the self-hosted version to be used as a component in an internal tool so non-technical people can tweak their prompt chains without writing code. As far as I remember:

1. it became increasingly slow as I added flows (felt like a O(n^2) ish bottleneck)

2. There were many bugs and bad UX

3. the flow variable system was underbaked and underdocumented

4. feature gaps

I decided I was probably not the target audience for their app and moved on.