Changing from animatable to static unlinks textures. Would love that not to happen. I have big props that change from 1.5 GB to 5GB when changing back and forth, and re-linking takes time on these complex props.
Changing to static also removes the ability to attach, which would be nice to have available to consolidate non moving objects. For instance, a placemat on a table might want to be attached to table, so if table position changes, they both move. If you have to turn it back to animatable, your adding extra steps, like re-linking. With complex models this is not ideal, if possible, would still love to have attachments buttons in static mode.