Is it possible to do a simulation that tests two different applications (but at the backend level having common elements and influence on each other)? Each application has different baseUrls, but I would like to simulate using them in one simulation. Theoretically, I could have two simulations fired in parallel and maybe that would be a better approach. What are your opinions?
You can execute multiple concurrent scenarios with different protocols in the same simulation, see https://gatling.io/docs/gatling/reference/current/general/scenario/#protocol-definition.