>Many people fear using new open source project if it is developed by a small team or even a single person.

I fear because that makes for a smaller/single point of failure. Some guy or a few people make something really nice and useful which you like? Well, he's gotten bored now and has decided to stop developing/maintaining it. Now you're screwed for some time until other people pick it back up depending on demand. Feels like it happens way too often, so I'm not too interested in picking up new things too much compared to established projects where people are actually paid to do it or at least have some responsibility.