If you adjust for inflation it's been true for about 50 years in every part of the software industry (especially games, fintech, insurtech, automation, web..) among the top companies. Everywhere you look people have made a ton of money whenever the state of the art gets to a point where you can apply software tech to something that's not been done with software before. It's a sort of ongoing 'goldrush' where developers move from one field to another as tech gets to the point where computers are fast enough and clever enough for an existing industry to realise there's enough value in optimization to make it worth paying for.
The only thing that's changed recently is that now startups aren't waiting for lumbering old incumbents of whatever industry it is to invite them in. Now software companies are pushing the incumbents out because the data that old industries use as a moat is open enough to not be a barrier any more.