The downside of a big broad sandbox game where virtually anything is possible, is accessibility.

It's one thing for those of us who have been soaking in this tub for a while... we're used to the temperature, newcomers though?  Not so easy.

So it's good to have clear accessible entry points for new players to jump on.

I get that it's a bit of a disruption/distraction for those of us in here (although we try to give enough warning that players not only are not put out, but can even take the opportunity and thrive from the break and brief time-skip) but it needn't be a negative. 

Comics and tv get that point of accessibility as well... its why they tend to have clearer points for these breaks where plot elements can easily be described for newcomers to get up to speed.