TBH no we haven't considered them. Our initial approach is to keep things as simple as possible and have everything performance critical in one language and if possible in the same process (which is not the case for now). Having said that, if we see that there are better alternatives that will make the project easier to maintain and develop, we will apply them.

If the big architectural differences between Electron and Tauri came out in Electron's favor for your project (i.e., if differences between rendering engines were a real problem in practice), then I'd say it would almost certainly be a mistake to choose Tauri just to avoid having to do FFI. Of course, if rendering engine differences aren't a problem in practice, then the choice is much lower-stakes and what you're currently doing will probably be fine.