That’s probably the engine and the default settings.
Epic loves to flux with users by not even bothering with performance management.
They simply keep releasing stuff thats worse and worse for performance.
By 2025 we’ll probbaly reach 5fps on a standard project in 1080p at this rate.
Also, it only gets worse. Never better;
In .25 you had up to I think 130fps for 4k, in .27 you got 20% less. In 5 you got close to 60% less… and at that point you just stop using their engine if you are a somewhat smart person…
Whats unexplicable to me is that Fortnite got the same performance falloff with the different engine version, but none of the pro player apparently give a f.lux about loosing 20% of their frames… or if they do they didn’t compain enough I suppose…