I still feel the pinnacle was ~2011 Windows Phone. It was some kind of swipe-to-type, but maybe not Swype specifically? At any rate, it seemed to use "how humans actually talk" as a guideline, because it was do a great job of predicting what words I would actually mean to use in a row.
Modern keyboards are like, I know you just said "I want" but instead of predicting "to" I predict "rip". I mean the letters are close. And "I want rip" makes way more sense than "I want to." You're welcome!
Apple keyboard is shit. Swype (the one Microsoft bought) is better but still shit. Gboard is ok. But none of them are close to that windows phone keyboard. I still miss it.