From a different direction - I started with the 24-105, later bought the 24-70 v2. Still have and use the 24-105 as a single lens option for the IS and the longer zoom range. Have also been starting to use it more often in portrait sessions again as it is more kindly to skin textures, which means less effort to process, and any time I want a wider aperture I go to a prime anyways as 2.8 isn't as much of a jump as I am usually going for in that instance.
Definitely use the 24-70 for landscapes and product shots so no regrets there.
I guess it all comes back to deciding which is the better tool for what you want to do.