I am following up on threads, and threads::shared all the time. There is basically no profound improvement in this area, although there might be bug fixes, like memory leaks. So to give a direct answer to your question, if any defect discussed earlier on this forum discourages you, then don't use threads at this time.

This does not mean that I agree that fork is better than threading, but rather that it is not wise to invest in perl thread at this stage.