Comment by lateforwork

It really depends on how reliable you want the code to be. Many business application developers prioritize development speed and don't want to think about errors, for them checked exceptions may seem like a hassle. For developers who prioritize reliability unchecked exceptions are a huge problem because they are not part of the contract and can change without notice.

Because java is garbage-collected and doesn't have any of the problems of C++ exceptions, so checked exceptions just become a nuisance of having to try/catch everything.