It's not really a hassle to configure your i2p node. I2p network recently went through a DDOS attack. Even during that point of time I had no issue surfing/torrenting.
Ah, I meant that there isn't enough content on I2P because people are lazy to switch. For example, I torrent Asian media (using nyaa) and the last time I tried using I2P, I didn't find a lot of what I wanted. Hence I decided to go for a seedbox.