I started roasting green coffee myself cause it's cheaper, so I always want to taste it unadulterated to get better and know the important factors in detail. But I also enjoy coffee every other way.
I don't think you can achieve a spiral orbit in an area with so little friction, mostly devoid of dust and gas, else the earth would be on one of those too...
Everyone has given great answers so far but I wanted to point out that since stevia tastes kinda bad, most stevia extracts I can find are actually mostly erythritol (another low cal sweetener) with a small portion of stevia. I find their marketing to be quite close to a lie, but in any case, both products are as safe as any transformed food you're gonna find, so fine with moderation. It can be argued to be better than sugar except if you wanna count the sugar taking habit, which both encourage.
I have a homemade wine supplies shop near me that fills the bottles I already had and gives them back for less than half a replacement. I would assume many such places are equipped to fill CO2 canisters all around the world. I think they also do it at the hardware store.