@Jebsu
I got a vague sense. In terms of story, it is perspective driven. MC is doing his own thing, living life and having fun for the most part, while also traveling around to go sightseeing and shit. The others are still stuck inside "generic isekai plotline" mode (defeat the demon ___, power leveling, killing 1 or 2 crazy bastards, saving the kingdom, etc...).
However, MC has just recently, basically solved all of that, unbenonced to the other "heros", who are currently powering up in order to do their task, and find MC (who they thought was dead, and may still think so).
In other words, MC's plotline is dedicated to world building, amongst other things, while the other Hero's story gives you the political views of the human kingdoms, as MC has not been to one in a while.
Remember, MC is more or less a literal God at this point. And his wives are not as big of pushovers either anymore. His only concern is for the unexpected, like when one of his wives gets kidnapped, or randomly warps somewhere.