This is beautiful! And now I'm nostalgic for my IIIxe. Through the rose colored glasses of poor remembrance, that might've been peek productivity in a handheld. It had enough functionality to remember all the things I cared to have on my person at all times, but was utterly lacking in notifications about distractions. It took me a while to quiet my iPhone so that it's not always pestering the hell out of me, but Palm was opt-in. If you didn't tell it to tell you about something, it kept its mouth shut.
I wouldn't actually go back if I could, but part of me misses that.
I feel the same. I loved my IIIxe. I'm guessing we'd be horrified at the UX now if we could go back, but at the time it was a huge boost in productivity. The handwriting language was really great. I actually wrote papers on that thing! It was great, I could work on papers while on the bus or travelling, without having to lug around a laptop. Remarkable devices.
I played with an emulator (https://cloudpilot-emu.github.io/) recently and it's honestly not that bad at all. The resolution is bad by today's standards but the basics are all there. It even has a system-wide search that looks for the input string in all your apps and lets you tap right into those records. That's pretty handy!
I like my phone too much to go back, but if I had to, I could make do.
Control over notifications is one of the most powerful UX features available. I make extensive use of geo- and time-based focus modes for the few notifications that I ever allow.
I wouldn't actually go back if I could, but part of me misses that.