It’s finally time! Sometime later today Blizzard will be increasing the quest log cap!
Quest Log (Source)
We’ve seen feedback about the quest log cap for a long time, and we agree. It’s time to increase it. With a change coming soon today to all Dragonflight realms:
The maximum number of quests that a player-character may have has been increased to 35 (was 25).
Have fun taking on (up to) 10 additional adventures!