My experience is that they reappear. I had my first like 13 years ago and then I had around 4-5 a year. The summer before T onset they became more frequent, but strangely enough I have barely had them since I have tinnitus. When I do have migraine with aura, most of my tinnitus sounds almost disappear.
Visual auras are pretty scary, I was sure that I was going blind when I first had it, but normally not so serious. But in some cases, more so of it's frequent without the pain part, it can be a sign of other issues. But right now, don't worry about it.