I saw you are reading up and got some personal stories about pancreatitis. Be sure the vet gives the test suggested on the primer. To answer your question on Health, it seems most cats do well with a pain med (if they feel lousy, they don't want to eat) and sometimes syringe feeding or fluids. But no, it doesn't mean it's that way forever. Pancreatitis seems to come and go. Sometimes there is not a flare up for months and months.
Maybe start a new thread on Health. "Does your cat have Pancreatitis? Tell me what it's like." or something. I think you would be reassured. Or pm the people who replied - i think Terri did? - and ask her what it's like for her.