I recently found Nex in the context of Wasmcloud [0] and ability for it to support long-running tasks/workflows. Impression that indeed Nex needs a good time to mature still. There was also a talk [1] about using Temporal here. For Hatchet it may be interesting to check it out (note: I am not affiliated with Wasmcloud, nor currently using it).
[0] https://wasmcloud.com
[1] https://www.temporal.io/replay/videos/zero-downtime-deploys-...