Thank you for this! I used the instructions in this post to dry some of my pandemic starter back in summer 2020 when it was still pretty new and I didn't know if it would survive 2 weeks of me being away. I learned that I could keep it in the fridge for 3-4 weeks with no feeding and revive it so had never used the dried starter but kept it in a sealed jar in a dark cool place just in case. Fast forward to now and we were renovating our kitchen, and I neglected my 3.5 year old starter for too long - after about 8 weeks (!) I found it moulded and foul smelling, so I came back to this post and it's now successfully revived. So you can definitely keep and revive at least 3 years later.

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