...and extend. I'm sure this architecture was easier for MS but it opens the door to code that runs on WSL2 that doesn't run on regular Linux.
They and the clones won the war with IBM in the 80s and 90s because IBM was worried about things that didn't matter: they wasted time with things like an operating system CP/X86 that ran DOS and 3270 emulators to their mainframes on top of a GUI system called mermaid (3270 PC) while Microsoft was writing Windows 3. Oh yeah did I mention some configurations cost $20,000 each? some configurations cost $20,000 each.
Because IBM wanted to secure its AS/400 minicomputers, mainframe, and microcomputer line and make them interoperable, as if a PC user sitting in their den would be connecting with $500,000 or so of other IBM machines, everyone else ran circles around IBM. They kept up the "whole kitchen sink" system way way past its due date.
This also happened to DEC, which responded way too late in the game to be relevant, SUN, SGI, and Wang. And it may eventually take down Oracle.
So they're intentionally taking an uncommitted, decoupled approach. I'm paying Microsoft as a result. I pay GitHub and Azure bills every month and run exclusively Linux.
They can't sway around as a monopoly like they could in 2000, once Ballmer left things changed rapidly. It's not going back. They have effectively zero cloud software (database/operating system etc), effectively zero mobile presence, and most people don't really like Windows.
In a tightly coupled stack you're only as strong as your weakest link, and MS has a bunch. Their biggest risk now is to HP or GM themselves; basically gobble up a bunch of things, blend it into indifferentiable blandness and collapse while waving a giant sceptre labelled "greatest company of 30 years ago" (HP bought DEC, Cray, Tandem, Apollo, Convex, 3Com, Phoenix, Palm and SGI and did effectively nothing with them beyond slapping an HP logo on their final pre acquisition product line and then just rode it out without any followup. HP knowing only how to fumble the ball every time for 20 years is why big business switched to Linux. HP took all the alternatives behind the barn one by one, cut them a fat check and then shot them. Simply crazy)
So yeah, it's a different game now.