system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why aren't there "Coffee Bags" in the same way that there are Tea Bags? Why is making coffee more complicated?
gpt
There are, but there's a few reasons why they haven't caught on as well as teabags.

* Most avid coffee fans prefer coffee that's made with some form of pressurized heated water. An espresso tastes quite different from  a standard drip coffee machine's output because the water aids in forcing the volatile oils out of the bean, something that doesn't happen if you just steep it. 

* Regular coffee drinkers typically want their fix in a convenient fashion. Coffee that has to steep in a bag slows down the process. Tea's typically a drink for a more relaxed mood so waiting for it to steep is more acceptable.

* Coffee requires more input ingredient than tea to make the same relative amount of strength. Compare how much coffee you use versus how much tea you use to make a beverage in something like a French Press. So stuffing all of that coffee into a "soaker" bag is a little bulkier. 

* Coffee has an "instant" form for people that are in a real hurry. Just a spoonful from a large package can make a cup without any steeping or waiting at all, just a source of hot water.

**TL;DR**: They do sell them and they're great for some applications, but other forms of making and serving coffee are more convenient.