Well take the case of bcrypt and md5. Assuming bcrypt takes about 300 times as long^ as md5, then that would be the difference between cracking a password in a day versus a year.
You'd need someone very patient to wait a whole year for your reddit password. And if you change your password every 6-12 months anyway, they are most likely screwed.
^ I picked 300 out of a hat, I think that bcrypt is usually 2-3 orders of magnitude slower, but no reason you can't recursively apply it to stretch it out even further.
