Is systemd-resolved essential?

[Robert Heller]

I have several machines on a LAN (some fixed workstations and a couple of 
laptops) all running Ubuntu 18.04.  I also have a local server on that LAN 
(presently running CentOS 6) running Bind9 providing *local* DNS services.

Almost every week when I run the software updates, I have to restart 
systemd-resolved, since for some reason it "forgets" about the local DNS 
server.  This is at the very least annoying.  I am considering just doing 
'apt-get purge systemd-resolved' and doing completely without 
systemd-resolved.  Is there ANY compelling reason not to do this?

-- 
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