Originally Posted by
findark
Huh? Tickets with a change fee are absolutely "changeable" - they simple have a fee for doing so.
Restricted Economy tickets (at least typical domestic ones) on DL carry the endorsement "NONREF/PENALTY APPLIES"
You didn't read by whole post. When it comes to plane tickets most are NONCHG. Being non-changeable has nothing to do with being able to use the value towards a new ticket. BE have a restriction that the value cant be used for a new ticket.
It's just like being refundable doesnt mean you can get the whole amount back. You could have a 50% penalty.