, is it always interesting to use MIRA with Eclipse? => No, unless you very specifically want to run a witness server on 4GB of ram but the tradeoff in speed is not worth it.

There isn't really a full node anymore, because a lot of the data has shifted to hivemind, the biggest node configuration available now is what we call an account history node, and it requires 64gb of ram and about 400 gb of space. If you want to learn more I encourage you to read this : @gtg/witness-update-release-candidate-for-eclipse-is-out