When dark energy was first accepted, it seemed to me, as an outsider, that it happened very quickly, without, apparently, any time as a possibly-contentious, 'c

When dark energy was first accepted, it seemed to me, as an outsider, that it happened very quickly, without, apparently, any time as a possibly-contentious, 'could this be so?' hypothesis in the way that, for example, dark matter did (and, to some extent, still is.) That surprised me because, up to that point, there seemed to be a problem with the cosmological distance ladder, with different methods getting different results, and with there being stars that seemed older than the universe supposedly was. In comparison, when superluminal neutrinos were tentatively announced a few years ago, there was a lot of justified skepticism about there being experimental error (admittedly, overthrowing special relativity is an even more extraordinary claim than dark energy.)