That’s still very much the case. All planets are, by definition, in our solar system. Any planet-like bodies not in our solar system are called exo-planets.
You make it sound like exoplanets are not planets, but they are, unless you have a recent source that contradicts my education.
Sure, how about this https://www.dictionary.com/e/exoplanets-and-planets-the-truth-is-out-there/
Not really, no… it’s a comet or at best a rogue kuiper belt object. It’s smaller than earth’s moon, its orbit is wildly elliptical, and it hasnt cleared out its orbital path. Many reasons not to consider it a planet, and so it was dropped.
If Pluto was to be called a planet, then Ceres would also need to be called one, and everyone seems happy with calling that an asteroid.
