If such comparisons are being made, I'd be interested to know whether the "three times the number of quests or more" for CoAS are full storylines or short, partial stories?
According to the touchy
Poll - What Version Are You Playing And Why thread:
French National Questline
Dutch National Questline
Spanish National Questline
English National Questline
Pirate Questline
Peter Blood
Kill the Beggars
Austin Quest
Hunting the "Blue Bird"
The Double-Barreled Musket
Tenochtitlan
The Enchanted City
City of Abandoned Ships
Ascold Quest
The Ship of Souls
La bella Isabella
As far as I know, virtually all the above are technically side* quests, but they are far longer than most sidequests in PotC and PotC:NH.
The exception is Peter Blood, which is a relatively short main quest that provides a custom opening before switching to free play.
I have absolutely no clue how they compare in length to the
main quests (=storylines) in NH.
Either way, this is comparing stock CoAS (no mods) with modded PotC (New Horizons), so it is apples and oranges really.
Based on everything I know, none of this should have any relation to Eras one way or another.
* = I consider a "side" quest to be a quest that relates in no way to the player character. It is therefore available to any and all player characters.
A "main" quest (or "storyline") does relate to the player character and would make no sense for any other character.
For example, "Strange Things Going on in the Caribbean" is a long quest in PotC, but it doesn't relate to the main character and is therefore a sidequest.
Devlin Opera, on the other hand, is unfinished (and therefore excluded from the default mod install), very short, but does relate to the main character and is therefore a main quest.
Similarly, it would make no sense to play through the "Horatio Hornblower" storyline as "Jack Sparrow" and therefore this is not normally possible in PotC:NH.