This really depends on the game and your personal goals. Engines like Unity, Unreal or Godot must cover the entire game development landscape, but the 'engine feature slice' needed for one specific game may be so small that such generalist engines don't provide much help or are even actively harmful because they force you into building the game in a certain way. The most useful engine-part in such cases might be the tiny platform abstraction layer to work around driver- and OS-API bugs - but usually this platform abstraction layer can't be used alone, and alternatives like SDL also have accumulated lots of such fixes and workarounds over the decades.