>Most of the modern games today aren't made with the Unreal engine...For example, among triple-AAA studios, EA, Rockstar, Activision, and Ubisoft all use their own engines (note: Activision uses Unity for some of its games).

Just played Tony Hawk 1+2( remaster by Activision) , which uses Unreal.

It's going to heavily depend on the team and the project.

Generally lower spec games are good fits for Unity, while Unreal is best for higher end ones