i'm not sure what you're asking here; there has never been any redundancy for
host network connections, or for toolserver database replicas, so nothing
happened to that - it wasn't there in the first place.

if you're suggesting redundancy should be added - yes, that would be nice,
except that to duplicate 3 database servers would cost around EUR20,000, and
even that wouldn't help if the network problem was elsewhere (for example, if
our transit connections had been on the card that failed, everything would have
been offline, not just one server).

perhaps we could duplicate the entire toolserver setup at another location.
that would cost around EUR30,000 in hardware, as well as monthly rental and
transit (for at least 16RU space, which wouldn't be cheap, and a fair amount of
bandwidth), and would significantly increase the administration effort needed,
when we hardly have enough time to maintain the current set of servers.  and
what would it save - a few hours downtime in the rather unlikely event of a
linecard failure?