I think it depends on the market. There are some markets where complexity is really a pain. There are other markets where existing products are already simple e

I think it depends on the market. There are some markets where complexity is really a pain. There are other markets where existing products are already simple enough for the given users that this is not the main concern. Unfortunatelly in markets where complexity is a huge pain nowadays it is very hard to find or build the relatively simple solutions. Otherwise others would have found/built it already. So yes, yet another bug tracker will not win in the market just by being even more simple than the other simple bug trackers. But in a market where users are actually fustrated of the complexity they have to deal with - it can hit big. For example in case of programming languages, frameworks it is a big selling point to be simple: programming can become fustratingly complex if the tool is not designed with simplicity in mind (see enterprise Java). That's why things like Ruby on Rails are successful.