Contemporary linux runs well on decades-old portable hardware : https://raymii.org/s/blog/My_24_year_old_HP_Jornada_can_do_things_your_modern_iPhone_still_cant_do.html [raymii.org]
They bother to cite NCommander, even:
NCommander has an excellent video on the 680e and the use of the device at the Dutch Railways (NS).
Tried to post previously with better title and dept but the sub was wiped.