Another take, to feed your cynicism: MSFT need money to keep investing in this sort of science. By posting announcements like this they hope to become the obvious place for investors interested in quantum to park their money. Stock price goes brrr, MSFT wins.

More cynical still: what exactly has the Strategic Missions and Technologies unit achieved in the last few years? Burned a few billion on Azure for Operators, and sold it off. Got entangled and ultimately lost the JEDI mega deal at the DoD. Was notably not the unit that developed or brought in AI to Microsoft. Doing anything in quantum is good news for whoever leads this division, and they need it.

On the bright side, this is still fundamentally something to be celebrated. Years ago major corporations did basic science research and we are all better off for those folk. With the uncertainty around the future of science funding in the US right now, I at least draw some comfort in the fact that its still happening. My jaded-ness about press releases in no way diminishes my respect for the science that the lab people are publishing.

That's all you needed?