It depends what you're looking for. For specific hobby/trade subs, plenty of fora still exist. For anything interesting in tech or medicine or law, I like thi

It depends what you're looking for. For specific hobby/trade subs, plenty of fora still exist. For anything interesting in tech or medicine or law, I like this site. If you just want to replicate the intelligence and attitude of the larger subs, Twitter seems an apt replacement.