Nowhere in this post do you successfully make the case that he's not old money. You may have demonstrated that he didn't fall victim to many of the tropes that his contemporaries did, but the fact remains he had (a lot) more than most people would at any point in time (including opportunities and contacts).

I still remember the moment when Bill Gates switched from being the "Microsoft guy" (during those times sort of akin to the new Satan) to being the "philanthropist" that he is now. I'd say it's been a very successful bit of public relations for him if this is how you see him now.

I don't understand why do I need to prove he isn't "old money" old money is a pretty defined term unless you want to use it in the most ambiguous way.

Both of his parents worked (and unquestionably very hard) for a living and while lived a comfortable life it wasn't one of some extreme affluence.

His parents is what we would for the most part consider upper middle class or "working rich" it's not like Bills childhood could be a backdrop to a scene in "all the money in the world" or anything similar.

I've also never considered Gates to be a Satan or anything of the sort regardless of Microsoft's practices I've always have had an admiration of him as well as many other successful people.

Class isn't just about money your falling into the fallacy that the USA doesn't have a class system.

So wait now it’s about classes? It seems like every time the goal posts move.

Its a bit more subtle than that you need to look at the signifiers and not just $$

Bill has a generational qualifier for example and look at his family background and where he went to school.