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.
The swiping keyboard from Apple simply refuses to do "and" for me. I get "abs" (I'm not a gym rat; I don't talk about that) or "Abbas" (the only one I know is the Palestinian president, and I don't talk about him either) almost every time. I hate the autocorrect-something-five-words-back problem, but not being able to recognize one of the most common words in the language is unacceptable crap.
I'll give Swiftkey another try.