Comments are rarely deleted (they could be) - however the reputation whore is a reason few actually leave comments instead of attempt at answers. However SO is

Comments are rarely deleted (they could be) - however the reputation whore is a reason few actually leave comments instead of attempt at answers. However SO is bad for not-so-common, above advanced knowledge. Some Tags (C# for example) have good support but some effectively don't (Java). OTOH: 500rep bounty usually can do that trick if there would be anyone to shed light.