When I first started working with ECS I was super sad to discover that there was no support for hotswapping at the time. Right now I am undergoing a huge refactoring of my code and updating to 2019.1, so I can't really check for maybe a week, so I will ask it here Is ECS currently supporting hotswapping, and if not, any prediction of when it will be available?
when you start play mode, alt tab to visual studio, change the code, save, alt tab back to the editor and the code recompiles and now you are on the new code Edit: This thing
I don't think it can in a sense, you can do with separate Monobehaviour scripts in certain cases. Here all is linked and often tied after compilation to threads, and whatever else is going under the hood. Not sure, if that would work in same way, if you got modding feature, with separate dlls files, to upload code at runtime. But most likely, is not what you ask for. May I ask, why do you require update script at runtime, if is that what you ask for?
Because it's way faster to develop when you don't have to start a test from scratch to change a small coding error
Supporting hotreload of script code that does not involve domain reload is something we are planning to do. It is not currently being worked on. Focus right now is on building the different core systems.