They state in their documentation that the software is alpha (https://openobserve.ai/docs/ OpenObserve is currently in alpha, but don't let that stop you from trying it out.) . To be honest I didn't bother to investigate why ingesting data stops working after a few days, might be my installation then.

I'm very curious which organisation uses alpha software in production

Anyone else looking at openobserve. Looks OK for homelab, but not really stable