LDP Session Protection Vs Targeted LDP

Just wondering why "Session Protection" command was introduced. I can achieve the same thing with a simple targeted ldp session. It lets me specify a range of peers via an ACL, and by default it will timeout after 24hrs, or can be configured with infinite duration which would make it the same as targeted session. Is that it? or am i missing something here?
Networking, sometimes i love it, mostly i hate it.Its all about the $$$$
Comments
*unless you use the mpls ldp discovery targeted-hello accept on one side, but you still need to configure it on the other side.