I think they could use expansions as measurable time spent. 3.0 to 3.55 took X amount of months, 4.0 to 4.56 took X amount of time. And if a year passes, then go for it. I understand that the events can be quite rushed (the whole doman ark of 4.2 and 4.3 could happen in 24 hours), but major events like rebuilding Doma, Idyllshire, yeah it breaks the immersion a bit.