Valve reassures Team Fortress 2 players that it's still working on the Mann vs Machine update it announced last year: 'We promise we're making progress'

I'd completely forgotten Valve is working on an update for Team Fortress 2 's cooperative Mann vs. Machine mode, though in my defence, it's been a long time since we last heard about it. The prospective patch was announced in June last year, via a blog post on TF2's official website that requested map and mission submissions from the community in time for this update—with a "fictional deadline" of