My opinion is somewhat that the last "real" cyberdeck was the Hackberry Pi, which is essentially the Blackberry I always wanted and that they never produced. Due to it being fully open, there's an insane amount of 3d printing community overlap, where people share their upgrades, designs, modifications and customizations.
Raspberry Pi as a platform has revolutionized access to computers in my opinion, though since the RAM crisis started not so much anymore due to the insane price differences. But the Hackberry is the computing device where I think it has lots of potential for being my actual "Linux on the go" that I wanted but never got ... for the last 15(?) years waiting for it.