I am in the same spot and have been doing nothing but side missions for the last two days. It feels like every time I finish a side mission, I run into another villager with the little thought bubble who lays another side mission on me. I think I have more side quests stacked up now than two days ago when I started chipping away at them.
Not complaining, because the gameplay and scenery is very enjoyable. Just an observation.
That's how I got to 187 hours in AC: Odyssey. Side quests never seem like a chore to me because in games I am an explorer at heart. "What, you are giving me a reason to have to explorer that mountain? Okay."