Some developers are seriously considering de-listing their games from online shops when the Unity Runtime Fee kicks off at the start of next year, meaning some titles built on Unity could end up being temporarily — or permanently — unavailable. Here's what developers are saying about the Unity Runtime Fee on social media, and what games could be impacted.
Concept, yes. The actual infrastructure, tool chains, and processes are usually not. The IDE is different, the language is different, the keyboard shortcuts are different.
The only non-pain point are probably assets. But the code is not really transferable.
Most of the stuff needs to be completely rewritten.