Good idea starting a new thread.
I do much the same with programming of the Anytone. Unless I've missed
it, the SW doesn't seem to have a way to limit the coverage of the radio
to the amateur band and I'm always cautious about inadvertent out of
band operation.
Most of the time a simple frequency 'label' is enough but, from time to
time, I find a text label can be useful (eg I have one on my VHF/UHF
radio labelled for the club net, plus the local repeaters etc.)
As for activity, I always used to monitor the 4m calling channel but
confess I'm not as assiduous these days about it. There is some
activity- there seems to be a number of people in Essex (I'm in Nth Kent
so I can hear them) plus in SE London and the Dartford(ish) area.
Several I've spoken to have commented they use the antenna that is on my
website- nothing special, just a dipole, but it is easy to build as it
uses readily available bits, requires minimal tools, and just works
without any fiddly tuning etc.
Some years back- it must be 25+ now- the local RAYNET group bought a
batch of old PMR kit and a few of us converted them to 4m. The process
was repeated may be 15 years back with a local club. Each time there was
a flurry of activity on 4m but the 'problem' seemed to be a reluctance
to install 'another' radio (and antenna) in peoples' cars. Modern cars
tend not to have the real estate for more than one radio installation,
at least not if it is to pass the XYL approval test.
The few mobile stations I hear seem to be people who drive vans etc,
probably a 'working vehicle', during the day.