You can read more about it here: https://en.wikipedia.org/wiki/Korean_language
I've been tempted to learn Korean since I discovered this factoid, but haven't found a program or the time that I can stick to.
Anecdotally, I'm learning Dutch right now to prepare to move overseas next month, and the basics haven't been that difficult. I feel pretty confident that I can order food and exchange daily phrases after only a few dozen hours of practice. Lucky for me, the Dutch also speak excellent English, but I'm trying to learn anyway!
Featural scripts are pretty rare - it seems that they never evolve naturally, so it's something that has to be constructed, and then also to become popular for long enough to stick around. The only example I know of other than Hangeul is https://en.wikipedia.org/wiki/Canadian_Aboriginal_syllabics, and they are noticeably less featural.
(Featural scripts for conlangs are more common - e.g. for Lojban, there's Zbalermorna: https://jackhumbert.github.io/zbalermorna/write-up/)
One thing to keep in mind though is that Hangeul was very systematic and consistent back when it was designed. But languages evolve, and they evolve much faster in the absence of widespread literacy and mass media. And Hangeul is almost 600 years old now. So e.g. ㅐ was originally the diphthong "ai", consisting of ㅏ for "a" and ㅣ for "i", but it's now pronounced "e" - not dissimilar to English, actually, but with much more rapid and drastic changes. At this point, it's actually less phonemic than Serbo-Croatian.
Still, if you can speak Dutch it’s appreciated, especially in less international areas.
I would say hebrew is also another interesting alphabet system
Up until 90s, early 2000s it was common to read Hanja in newspapers. Starting around 10 years ago they all disappeared. English words have largely replaced complicated Chinese characters and young Koreans no longer learn it.
Instead English loan words are now used so much that most Koreans can't go a few paragraph without using it. Downside it leads to confusion as to what the original Korean words meant. But for sure it is not comparable to Japanese which absolutely requires you to memorize a few thousand Chinese characters, their strokes, pronounciation and meaning.