[celestialcheese]

You could make this argument that Apple has done this with their IDFA changes. Wipe out the public water source (data attribution) to benefit their internal apple ads (new DSP + Apple app and search ads). Overall portfolio effect of that IDFA change has been extremely negative for every company but Apple.

Should I as a shareholder of both Apple, Meta and Google be able to sue Apple for their changes?

[msh]

You could just as well argue that apple have done a public good by preventing pullution (data sharing) by other companies.

[hn_throwaway_99]

All of these arguments pretty much point to the absurdity of this lawsuit. It's not hard to pull lots of different second order consequences out of your ass and then point to some big, societally impacting company as the source of whatever consequence (good or bad) you can dream up.