To be honest, the problems an adaptive keyboard fixed back then - entering contacts, entering email addresses and passwords have long since been fixed by other solutions.
Bluetooth, vCards, contact sharing, QR codes, one-tap logins, password managers..
To say nothing of NOT displaying the keyboard at all. If you look at an old phone, you notice how tiny their screen is, because half of the front side is reserved for a sucky 12 key keyboard.