The promised rolling restart is underway - though still not reported as complete. This rolls out a bunch of bug-fixes, but apparently no full list is available at the present time, so you'll probably have to guess at any behavioural changes.
This restart is described as 'aggressive', which apparently means that more sims are being restarted per iteration, and that's putting quite a heavy load on things, as judged by the uncharacteristically steep fall in concurrency through the process (dropping 15,000 users).
