Not quite often, just when geometry is too sophisticated to set up it via Simscale interface or I need to set up something unusual in functionality.
I’m asking because I’ve created mesh for my multiregion case (10 regions - too big to manipulate) using Salome and topoSet utility, and set up boundary conditions using python script afterwards. It’s frustrating for me just to think I need to start from the beginning and upload the mesh on Simscale first and then setting up BC via web interface again (and some functionality better to be configured manually - for example, setting up nonorthogonal correctors to 2 in Numerics for multiregion Conjugate heat transfer case on Simscale leads to enabling this option for both fluid and solid region, even though I want to apply it only for fluid region).
So answering your question - yes, I use it, but not quite often. When I finish my usual simulation on Simscale, I implement new turbulence model for example to compare results using case upload or make other slight changes.
I asked this question in support and I thought they missed my inquiry, but they just answered that solver I interested in will be incorporated on the next Thursday. Sorry for posting it here.