Great question! This type of "try before you upgrade" is something we've been discussing internally and credits should be a good vehicle for that.
Would love to learn from how you guys experiment with new models now. Some quick questions for ya:
How do you usually tell if a new model is worth adding to your workflow?
About how many generations does it take before you know if it’s a good fit?
What would make a limited "try before you upgrade" feel fair and useful to you?