* failing test
* hard
* ret_dict
* switch to _data for tests too
* update sqtt
* start work
* Ops.LINEAR looks good
* baseline with depth works
* support depth
* types
* @needs_tracked_pm
* update, marg can error too
* unwrap_or goes to many more places
* move things to soft_err
* soft_err everywhere needed
* diff cleanup
* use list
* rewrite it
* change
* update depth number
* small comment change