How much of the software on your computer is owned by You?

None. Not one line of code unless you wrote it. Even then, if you were working for someone else at the time, you still don’t.

All you ever have is a use license subject to the terms and conditions of the actual owner. When ownership changes, the Ts & Cs may, also, and you have no say over this other than to accept or discontinue the use of the app. There are times when laws or treaties may impose restrictions on this but the End User has no say in it. For example, California law requires OS support for three years after release.

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Corporate America has only one requirement. That is to make money for their shareholders. If the end user of their product or service was treated fairly or not is irrelevant.

Yep. One can look up Dodge Bros. v Chrysler and Dodge v United States to read the many cases that established this as US law.

BIAB 2024 Audiophile Mac
24Core/60CoreGPU M2 MacStudioUltra/8TB/192GB Sequoia, M1 MBAir, 2012 MBP
Digital Performer11, LogicPro, Finale27/Dorico/Encore/SmartScorePro64/Notion6 /Overture5