Ok I'll start. 🥳 Can't narrow it down to one but I can do my two favourite things:
(a) Lucien Hinderling using napari in a closed loop of acquisition -> segmentation -> interaction -> control 🔁: https://twitter.com/lhinderling/status/1484311795938381825 we always envisioned this but thought would take a lot longer to happen!
(b) that time @sirhc took a still-unfinished 3D progressive loading demo by @kisharrington and used it to look at a huge cosmological simulation https://www.youtube.com/watch?v=ofoURuz-Cbw 🤯