For my part, I found his methodological work very insightful but did not have the time, or perhaps the patience, to follow him in his extremely detailed reconstructions of possible “estimates” of measures of economic activity, and possibly of well-being, essential to ensure the high quality historical studies that he considered necessary, and worth being involved with.
And while these economies are improving, it is unlikely that their recovery will be sufficient to take the rest of the world along with it, as the US is no longer the locomotive of global growth that it used to be. This positive prognosis is not generalised to all the advanced economies, with the euro area in particular still facing significant challenges.