Continued use of `wg-quick save` and SaveConfig=true?

["Jason A. Donenfeld" <Jason@zx2c4.com>]

Hi,

I was thinking recently that most people have switched from a model of
updating the runtime configuration and then reading that back into a
config file, to editing the config file and then syncing that with the
runtime config. In other words, people have moved from doing:

# wg set wg0 peer ... allowed-ips ...
# wg-quick save wg0

To doing:

# vim /etc/wireguard/wg0.conf
# wg syncconf wg0 <(wg-quick strip wg0)

I think this is mostly a positive change too in terms of reliability.
Reading back the runtime configuration was always a bit hit or miss,
and I suspect that more times than not people have been confused by
SaveConfig=true.

That raises the question: are there good uses left for SaveConfig=true
and `wg-quick save` that warrant keeping the feature around?
Temporarily caching a roamed endpoint IP, perhaps, but how helpful is
that?

I haven't thought too deeply about this in order to be wedded to one
outcome over the other yet, but seeing some confusion today, again, in
#wireguard over the feature made me wonder.

Any opinions on this? Any one on this list actively use this feature
and see replacements for it (e.g. syncconf) as clearly inferior?

Jason