I remember these when they first came out. The handwriting recognition never worked. The Palm Pilot, which I did have, was a big improvement over it, even though it was still a mobile device that couldn’t connect to the internet except when it was docked to a computer. Wild times we lived through!
Name a technology that died too soon to fulfill it’s potential:
I’ll start:
The Apple Newton MessagePad - the Newton 2100 (last iteration) was truly a great device - before Steve Jobs killed it.
https://nostrcheck.me/media/public/nostrcheck.me_6690922093115274541689386977.webp
Discussion
The HWR in Newton OS 1.1/1.3 was terrible but Graffiti was available as a package which made the handwriting fine. Newton OS 2.0/2.1 had excellent HWR, but by then, poor press had all but killed the platform.
Also, the Palm most certainly could connect to the internet, as could the Newton. I was hugely into handheld computing back then and had every device imaginable.
I miss using Palm PDA's through the years. I started with the greyscale Palm Zire and moved up all the way to the Palm T|X. The Palm Tungsten T3 was my favorite, as it was Palm's fastest handheld that still used real battery-backed RAM instead of flash for storage.
If I could use the original Palm Graffiti (Jot) handwriting system on a phone today, I would break out a stylus in a heartbeat.
Graffiti died an undignified death. 
I got good at Graffiti, and then Palm switched to the similar but not quite identical Graffiti 2, all because of a patent lawsuit.
Hello!
When I last tried that app on Android there were too many incompatibilities with newer OS versions, unfortunately.