I’ve worked with UE4 professionally for several years - this is absolutely true. It’s hard to get really good performance out of the engine. Furthermore, it’s

I’ve worked with UE4 professionally for several years - this is absolutely true. It’s hard to get really good performance out of the engine. Furthermore, it’s a beast. The codebase is large and old enough that making deep modifications is very difficult and time consuming. That said, the tools are (mostly) great.