Just migrated to Zen this afternoon using https://github.com/Thinkscape/arc-to-zen, it's ok so far. I tried Zen a few months ago and at the time it didn't feel great compared to Arc (some transitions were not very smooth, some things didn't work just like in Arc) but it's really improved. After just a few hours I don't really feel a difference.
As a bonus it's based on Firefox so uBlock Origin is available.
As a bonus it's based on Firefox so uBlock Origin is available.