My main PDA was my phone, to be honest (an Ubuntu Touch-based phone
with an Evernote Client and a CalDAV-compatible calendar). I ceased to
use it in October.
At home I use my Palm IIIx, mostly as e-reader (Plucker, Aportis Doc
files) as a password storage. Sometimes I prepare text for my phlog
here (as I'm doing just now). And I the Converter program was used very
often in last few months I my wife often tasked me with conversion
between US and SI units during cooking (I got a cookbook from the
University of Berkeley and she started to use it).
Outdoors I use the Palm IIIxe (it has 8 MB of RAM instead of 4 MB of
the IIIx) as a shopping list, a notetaking/sketching device, a password
storage, also for list of geocaches (I have no GPS for it s I cannot
use it for actual geocaching) and as a camera (with the ad-o Kodak
PalmPix camera module).
For GPS I use the Garmin eTrex Touch 25 and as a camera I use m old HP
PhotoSmart 730 (and, less frequently, the SONY Alpha digital camera).
I didn't use my PSIONs and Zauri for nothing serious in 2018. Except
for the PSION Organiser II LZ which I use as an alarm clock (it is much
louder than any old Palm). My Ben NanoNote was used for less than 10
times, mostly to play music.