I actually like the McDonald's ground coffee that you can make at home. For whatever reason, after you brew it, it doesn't go stale when you leave it sitting for a few hours. Maybe I should be more concerned about this.
Like @Cycadophyta, I'm not particular in my coffee needs.
Weekdays I drink a cup of Maxwell House at breakfast (never Nescafé; I avoid giving Nestlé my money whenever possible, and at supermarkets around me it's either Nestlé or Maxwell). No coffee during the workday, as I'm typically outdoors or on the road, and, uh, restrooms aren't always available, or convenient an hour or so after I might otherwise like a cup of Tim Horton's.
Weekend days I'll have a 1-liter pot of grocery-store medium-roast beans that I grind coarse for my French press. That's as snobby as I get: knowing that it's called a French press, and that a coarse grind means no silt at the bottom of a poured mug.
I never bought-in, literally or ideologically, to Starbucks coffee. Never have tasted their wares. I figure, it's just coffee: if I want to participate in group culture with my coffee I'll drink it at snack time with a cup of yogurt. The few times I've been inside a Starbucks shop is to use the restroom (see above).
As for McDonald's, personally I'd decline. Do you know about that cheeseburger and fries that were bought at the last McDonald's in Iceland, back in 2009? As of 4 years ago (2019 date of that BBC article linked) they were still intact. McDonald's positing that "without moisture in the environment, they were 'unlikely to...decompose'" is all well and good for a burger and fries, but that still-not-stale coffee you made hours ago ain't moisture-free. Have you experimented to see how old a pot can be before it's undrinkable, or, dare I suggest, sprouting?
I hyperbolize for humour, of course. I'm so unpicky that I don't even know what stale coffee would taste like: I'm not averse to nuking a cold mug for a minute to reheat it. But I'll drink it with just a bit of half-and-half in it, and you can enjoy your old McDonald's brew with whatever is in it.
For the sake of my stomach, I won't look at that link XD
My older sister works in the restaurant business... it's enough to turn me off of just about anything prepped "fast." Apparently ice and soda machines are almost never cleaned, either, since it's a pain.
There's nothing bad to see at that link, which is kind of the point. It's a BBC article that contains two photos of the suspect food in question, which is 10 years old (at the time of writing in 2019) and looking a bit, well, deflated instead of being completely decomposed.