Posted by Thorn-Delwyn 3 years ago (Source)

The basic mechanic of those randomized dungeons is basically the same as with group randomized dungeons meaning anyone can enter and there is no limit (besides a technical one) to the amount of players inside.

The dungeons themselves are shorter (about 10 minutes of playtime) and of course loot is roughly a little less than 1/5th found in group dungeons.
A zone will have between 30 to 50 active solo dungeons portals that can appear at about 80 positions where you'll normally find 'roaming' mobs.
Those positions are re-shuffled after maintenance.

We assume that the hassle that comes naturally with having to check that many dungeons and the "reward" limited to the gear of one measly player would discourage bigger groups to do dungeon dives.