I can choose to always treat Model changes as Experiments

(User Story, To be Fixed , Priority: Medium, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Experiments
Summary: This would be in my Profile, as a User Preference. If set, all changes I make to Models are treated as Experimental, and only committed explicitly.
I suspect this mode will be most comfortable for programmers, and really is better for serious work, but is mental overhead for casual users.