What changed five years ago, that Microsoft suddenly became so active again?

I mostly forgot about them for almost two decades. From around 2002 to 2018, I did not use any of their products or services. And in my interactions with other indie makers, I heard about them less and less.

I remember reading Paul Graham's "Microsoft is Dead" in 2007 (http://www.paulgraham.com/microsoft.html) and was jokingly thinking "Micro who?".

Then in 2018 they suddenly bought GitHub. And were back on the radar of every developer I know. With Azure, they became a bigger and bigger datacenter player. Then last year they made huge waves again, this time with Github CoPilot. Then this year, they were the first to put AI into a popular search engine. Before Google! And now they might become the first to put a crypto wallet into a popular browser.

Microsoft is 48 years old, but 2/3 of their market cap has been created in the last 5 years.