As @jkp said, we’re seeing more of this recently, and we will just have to see how it plays out in 2024. Even Amazon is going to start charging for some Alexa features, like Alexa Guard, that were previously free. Clouds have turned out to be very expensive for the companies as the services become more popular.
Amazon to change Alexa Guard features, begin requiring paid subscription
I’m not sure which way this one will go: the market will tell us. I think it’s a little bit like ads on streaming services. Even Netflix offers an ad supported tier now, after more than a decade of saying they never would.
I’m sure there will always be some free option somewhere, we will just have to wait and see how customers respond to the ones that are actually changing. I think we’ll know within the first year one way or the other.