Well, that's certainly an article title isn't it. But I mean it. Microsoft, don't you dare touch Valve. You're fat enough already and too big as it is, especially with the Activision purchase clearly about to happen.
"Liam, what's got you all like this?!", I hear you all asking. Well, remember that recent Microsoft leak that showed off a bunch of potential game releases? There was a lot more to the leak overall you see, and some of it a little disturbing for the industry. In an email from Phil Spencer spotted by The Verge, there was talk about their plans including wanting to buy up the likes of Nintendo and even Valve with Spencer noting "But our BoD has seen the full writeup on Nintendo (and Valve) and they are fully supportive on either if opportunity arises as am I" (BoD being Board of Directors).
Could you imagine the disaster it would be if Microsoft acquired Valve? There's just so many ways that would become incredibly problematic and wow — what a monopoly that would make huh? Not that Valve has any need at all to sell, they pretty much print money thanks to their 30% cut from most developers on Steam. Valve is also privately owned, so they can do whatever the heck they want. Valve are far from perfect, but competition is good and necessary and them joining together would really mess the industry up.
You might remember that "Microsoft Loves Linux", but the reality is they like Linux when it makes them money. If the above ever were to happen, it's not really likely they would continue all of Valve's big investments into Linux given how even with the Steam Deck the market is small. After all, Valve put all these resources into Linux because they don't want to be entirely at the whims of Microsoft for their store, and Valve clearly want their own platform so Linux with Proton + Steam Deck is key to that. And maybe even more when we find out what the heck Galileo and Sephiroth are.
So, Microsoft, please continue to keep your filthy hands off Valve (but keep putting your games on Steam okay? thanks).