I have a concept/security question...

Looking at the search options for Django, most recommend search databases or docker apps such as sphinx or elasticsearch. However, in my particular case I was able to create a Javascript real time search that functions just as smoothly as the sphinx one on my site and is simply using my already made django postgres models.

My questions are: What are the upsides of using a separate app or database over a javascript search? Are there size limitations to Javascript searches? Are there security risks with either option?

Thank you!