I had a big, big database in MN3.
Although I had sync problems, I haven’t experienced performance issue.
Starting from zooming in and out, it feels very smooth and fast. Yeah, the excerpt was slow as the size of the mindmap grew, but performance optimization option in settings worked quite well.
But now, with the same database imported from MN3, MN4 lags a lot.
Why is this happening? It’s very uncomfortable while using big StudySets.