Is it always a long wait at JFK? I might be here all night .....
You can renew online, but you won't know about needing another interview until after you renew. Some people have to go in, others don't. Might depend on where you've traveled.
some people have the interviewer come to them
Can you explain ?
ask @AJK he claimed that the interviewer came to his office to do the interview
Twas a joke referring to JFK as his office.
Per 5 years
Calendar years or actual years?
Can I use the credit for Nexus?
Not sure
No
what happens if someone misses their global entry appointment ? who do they need to call (several months later)?
Missing a G.E. appointment is grounds for having the entire G.E. application nullified, with a new application and fee needing to be paid. Some people get lucky and others don't.