What are your thoughts on so many kpop idols suddenly becoming actors/actresses?
Doesn't surprise me tbh. In fact, I expect it. There are some reasons I think so:
1. Idol lifespan is short, esp if you're a female idol. If you're a male, you lose a lot of popularity after enlistment. There are still dedicated stans, but there's newer and younger groups around to capture the public attention. For a female too, as idols approach 30, with very few exceptions they aren't the trendy girl anymore. So acting is a good way to lengthen your celebrity career.
2. Acting is just a lot more respected than being an idol. They're the true A-listers and top of the totem pole. Unless you're BTS level, most idols imo are considered to be targeted towards teenagers and youngsters by the gp so they aren't taken too seriously. It's how 1 Direction fans were looked at as mostly teenage girls in the West.
3. In every group, you can find 1-2 idols who are actually musically inclined and you can see them continuing to pursue a solo career even after the group disbands. Other members usually use their idol career as a launchpad. Get more popularity and visibility, get a few CFs or acting gigs with minor roles, and then use it to transition to acting full time. Suzy is a good example, Seolhyun probably trying for the same thing, don't be surprised if Minju from IZ*ONE does something similar. Cha Eunwoo, I can see him transition to acting full time, D.O from EXO too.