The most malevolent things he did were political and while in office. As anti-Trump as I am though, the clock ran out on that and the remedy (conviction of impeachment) was never completed. In that sense, that chapter is closed and now we move to all the other stuff.

Prosecutors in their respective jurisdictions should look for crimes and prosecute if they see malfeasance. In the case of NY, these are the charges that were at the top of the priority list for that one prosecutor. Multiple other prosecutors are looking at crimes in other jurisdictions and I would expect Trump to be facing charges in at least 2 and maybe 3 or 4 courtrooms on entirely independent indictments.