semaphore VS DAppNode

What is your opinion on ZK KYCAML? Something like semaphore is well equipped to facilitate otherwise anonymous or permissionless DeFi.

Sorry to hear. There's no way back from that, you won't be able to sport that one publicly. That being said, if we end up using something like Semaphore, you'll still be able to signal with it.

Yes, Semaphore provides an implementation which would help building it

Yes, you could use Semaphore, which uses zero knowledge proofs to allow you to prove that you are a member of a set (such as the set of owners of a particular NTF).

There are also "easier" options, like Avado, DAppNode, etc. and Stereum. We develop and use Stereum ourselves to run nodes for Lido and staking 2000+ keys, including mev boost (a bit of manual config needed but nothing too fancy). Maintainance for a node is not an issue, if you're gone for 2 weeks there won't happen much unless it runs out of disk space.

Attempt to fix it until DAppNode guys implement memory limits on their docker containers... (I found this as a reference... I think docker compose has to be redeployed to enable the feature, but I will wait until they implement that correctly: https://github.com/dappnode/DAppNode/issues/419)

this issue seems to track client support