With every EO game I've played I just started carrying more and more threads. In EO1 I carried 1 (why would I ever need more than 1?) and regret it.
Then in 2 I was all, "I'm going to be smart and carry a backup." And then I would forget and regret it.
Then in 3 I was tired of my own forgetfulness and carried 3 or 4.
In this one I said fuck it and carried like 8.
When EO5 arrives my inventory will be nothing but threads.
I carry two. Have gotten caught out once so far, and debating carrying 3. But I'm hauling around a bunch of nectar and medica since I'm using a Dancer for healing rather than a Medic, so....