It would be great to "archive" deals that have either been won or lost, so that they don't appear on the dashboard or deals table. This way you wouldn't lose the information from the deal and it would affect the figures on your deals dashboard.
Thank you as always for your continued feedback, it helps us build a great product.
We are constantly evaluating and re-evaluating our priorities and roadmap to deliver as much value to our customers as possible. At this time the ability to archive deals is not something our team is currently planning to build natively into HubSpot. This is certainly subject to change in the future and we will update this idea if that becomes the case.