Somewhat ironic Postfix has a record of no root/RCE in the default install, where opensmptd hasn't (CVE-2020-7247). Time will tell if it stays that way.
I consider my vi/vim skills to be extremely minimalist subset, and probably horribly inefficient, since they were developed to work accross a broad range of UNIX systems (SCO, Solaris, HP-UX, OSF, AIX) and I rarely add anything to my vim configs on top of that other than syntax highlighting.
But I'd still rather use it than just about any other text editor, just for the simplicity of that muscle memory alone. I have way more stuff to keep in my head than I have room for and I can't afford to expend more than about 0.0001% of context on a text editor.
Back in the 1990's I was fond of it for the community spirit, the attention to detail, the way things "just worked" even it had a particular take on some things. Over time it felt like it became burderned with design-by-committee decisions, maintainers leaving and abandoning packages faster than they could replace them, and just a bit too political.
Yeah perhaps learning UNIX API's and Rust at the same time doesn't lead to a drop in replacement ready to be shipped in major distributions. Who whould have thunk it.
Once you've taken most all of the other subsystems out of NT (which they pretty much have), all you're left with is is the crapload in the Windows subsystem.
My own retro 8-bit inspired VT100 terminal emulator called 8btty, mostly running Claude Code, either native build or integrated into the Unreal Engine 5 interface.
And you can also argue that that's overengineered (the original NT design docs were posted on here a while ago), that the UNIX model (while much more primitive and simplified) has proven more successful in the real world, and that the original "clean, overengineered" NT design has been buried under a progressively bigger truckload of crap year upon year and is no longer as clean as it once was.
You don't want to work for IBM unless your life is already over. Been there, done that, never again. It's depressing as hell. Your manager doesn't understand what you do, and they think that once your contract expires you'll be sitting around for weeks waiting for them to renew it.
Stratus VOS ran on a bunch of non-x86 hardware, i860, PA-RISC, 68000. It wasn't Windows (UNIX admin with a modicum of Stratus VOS experience in production, back in the day).