Alien Predator, do you even see how you've contradicted yourself?
The silly thing that happened was a completely improbabe Alien encounter between Ripley and the Aliens in Alien 3. That begat an even more improbable encounter. And that is why we are sick of Ripley. She was in one bad story after another. If Alien 3 and A:R didn't happen you'd be saying her story wasn't explored enough. Now is the right time to ignore those travesties and finish off her story with something more interesting, and then, I agree with you, we should move on to other characters.
It is most probable that Ripley wouldn't encounter the aliens for another 2 or three decades after ALIENS, or at least until the home-world is discovered. Once that happens, it is probable that Ripley does everything she can to sabotage man's quest to weaponize the aliens. That is such a better movie waiting to happen.
It's not an improbable encounter.
In Alien, she finds them by chance.
In Aliens, after hesitating, she decides to go back to where she found them.
Now knowing Aliens, they always have a nasty trick. Alien snuck upon the Nostromo, Aliens, the Queen snuck aboard the Sulaco via the dropship.
Alien 3, she also snuck aboard an egg. I am aware that people were pointing out that the egg is in some awkward corner in a ceiling somewhere right near the cryo-pods but that doesn't get in my way of enjoying the film. It's still a decent film with memorable moments and quite a fan base.
Then Resurrection has her literally ripped out of death just so they can get the Alien within her DNA. Some EU sources do state the Facehugger gives its victim a type of cancer which helps form the Xeno, cancer alters DNA (or so I've heard) so it makes sense why they'd clone her to get the Queen.
So as you can see, she's been showing up in so many films that like g2vd said, we're starting to get burned out.
I mean, come on, even you weren't happy with Covenant just having a relative of RIpley. I think I remember you weren't happy with it, neither was I. It's like either Ellen or her family are cursed with this, and it's getting silly now. With Amanda it made some sense as she was heading out to look for her mother, but jeeze, now her grandma also had an encounter... *sigh*
Oh yeah, I forgot that in Sea of Sorrows, a descendant of Ripley's also had an encounter.
God... it's like, so long as your name's not "RIpley", and you're nowhere near ANY Ripley, you should be fine in this universe.