Aeropress would probably be better than a French press in an office setting. More compact and significantly easier to clean
I just use instant at my office though. I rarely use it, but I prefer it to Keurig or the drip machine in our office.
But I mainly just drive in with a cup of coffee from home.
Eh I always end up with fines and they really bother me.
There are definitely quality levels of filter brewing too. From cheap drip machines that don’t get to the right temperature to really fancy drip machines can effectively simulate a pourover.
Just depends what you like really. Would say that a $20 French press setup will almost certainly produce better coffee than a $20 drip machine, but a better comp is a $20 pour over setup imo.
Idk how you are estimating the “coffee equivalent”, but I’ve found that the generic caffeine estimates for a cup of coffee are too low.
Would recommend looking up how much caffeine is in the amount of beans you use. Caffeine extraction is practically 100% in water.
I think typical estimate is 90-100 mg caffeine in a cup of coffee. With my coffee/water ratio, I think it was ~20% higher. And then the mug I use was much much bigger than a “cup”.
It is not, in fact, mathing.