In this game you can do different actions at the same time, which are mostly completely independent of each other. For example, if you are interested in following the story of another person you just met, this can easily be followed independently of other events.
That means you have to have a certain basic knowledge because otherwise it is difficult to follow a game status on day x at time y without the corresponding information.
With the new "hints" it is easier, but something is still lost. There is no specific order or point in time (apart from the task of preparing a podium presentation) for actions.
Which in turn means that new content has been added with each release so far, which one does on day 5, the other on day 16 or had no time/ interest to start it at all.
On trying out old save-files of previous releases you may lose new added content.
One ingame example for old-save-files:
Let's say you finished the storyline of the mayor and his maid in v0032.
You definitely got a little mix-up in v0042 as content was added.
In v0052 the problem is may solved but the completion of the v0032 quest is leading to further content you may miss as it's hidden now.
