My Toupet (partial-wrap Nissen) was 2009. I haven't needed reflux meds since then. Yay! A well-done Nissen, along with the hernia repair, should be good for many years. There's no guarantee about not needing acid reducers, but my doc's group (it's not a one-man operation) claims a high 90's% success. They've been doing it since the early 1990s.
Hiatal hernia and lower esophageal weakness are not related, although they can occur together. A small hernia is common, even more likely than not, in people as they age. A small one shouldn't cause a problem though and most people have no idea they have a hernia. If you haven't had a barium swallow in the last couple years it might be a good idea to check the size. The size can't really be determined just from looking inside the esophagus. Anything over a couple of centimeters needs to be repaired if you are having a wrap. You don't want the nice new wrap to be able to migrate into your chest.
I had a tiny hernia for a long time which was not a problem, but my valve was very weak, and I had poor motility in my esophagus due to polio as a child, causing mild reflux. A bad accident shoved my stomach into my chest where it got stuck - GPEH.
I was able to stop my stomach from refluxing when I found, with the help of my allergist, that my food allergies/intolerances were triggering it. (See many posts by searching with the search box at the top of the page.) I still had fluid leaking upward at night, but PPIs controlled the acid and I had no problem as long as I didn't eat before bedtime. I had no need of surgery until the wreck.
(Search for "cardioesophageal reflex" and "linked angina." Yes, that's reflex with an e, not reflux.)
My gastroenterologist didn't believe that food triggers had anything to do with reflux and my cardiologist was skeptical too. My allergist though, has seen many cases like mine, and the research is there. I can't reflux now, but my heart can still react to triggers. Tachycardia was a symptom that often followed reflux when I consumed too much of my allergen (sulfites in my case), and it still happens. A food sensitivity doesn't go away after surgery. That's why it's a good idea to keep a food journal to see if you have a food trigger.