You never know how good your backup are until things go wrong.
I remember RAYNET in the UK had some issues a few years back and when they tried to bring things online they broke, I suspect because the systems were patches on top of patches and running it on a new system just made it fall over. They have then taken the opportunity to rebuild the systems on a new base.
ARRL and LoTW might need a bit of time to put stuff back together in a way that it won't get hacked while at the same time improving the underlying hardware/software.