I am somewhat of an expert on Gears 4 and Gears 5 on PC, I played thousands of hours in multiplayer in both, and let me tell you, even after hundreds of hours, the game would still stutter. Some new effect, some sudden camera movement, some traversal thing, and it would stutter. If you install a fresh driver, the amount of stutters would easily quadruple until the shader cache is warmed up.
The engine has an existential stutter problem even before UE4, I remember Arkam City having an orgy of traversal stutters upon release, and it was a DX11 UE3 title, Arkam Origins and Arkam Knight suffered the same fate, Arkam Knight was so severe, the game had to be recalled on PC until it was "largely" fixed. Borderlands games have several traversal stutters, Bioshock 3 had them too. I even remember the Mortal Combat and Injustice games that were released on UE3 stuttering with new particle effects as well.
With the advent of UE4 and DX12, the frequency of stutters jumped through the roof, with UE5 the engine supported many new systems, which also made the problem worse. The engine needs a complete base overhaul in how to handles stutters and data streaming so that these issues can be fixed for good.