If you only need roughly the same layout, you are able to replicate it without too much programming skills with the open source AnySoftKeyboard. Just fork it and create your own board. If you need assistance, I'm glad to give you a bit of help.
Tried ThumbKey and realized, I'm 100 % used to QWERY/QWERTZ keyboard layouts. The ThumbKey keys are not in roughly the same spots as on a regular keyboard and I just couldn't get used to this. Damn brain. I might give it another try in the future, because the idea is damn great.
Fucking awesome phone. Been my daily driver for a week now.
Typing is horrible, tough, and for anything serious (browsing, streaming...) you will want a bigger screen and general more build quality. Camera, sound quality, screen are all screaming low end.
Super fast charging because the battery is tiny, sill good SOT because the screen is tiny too.
Feels damn good to be able to use and hold your phone one handed in almost any orientation you can hold your arm in.
Keyboard: AnySoftKey and a Compact layout (2 keys, 1 button) is very helpful.
ELI5: They can now make the fluffy white plastic go back to liquid very well, and they don't even need too much work for that.