> ... all the capabilities of reversing events can be done instead by reverting to a past snapshot and replaying the event stream. As a result reversal is never absolutely needed for functionality. However it may make a big difference to efficiency...
When I implemented undo/redo, I found that replaying from snapshots was fast enough. I wasn't working on a database-backed app though.
Implementing reversal is extra work and bug surface, so it should be subject to cost/benefit analysis.
> ... all the capabilities of reversing events can be done instead by reverting to a past snapshot and replaying the event stream. As a result reversal is never absolutely needed for functionality. However it may make a big difference to efficiency...
When I implemented undo/redo, I found that replaying from snapshots was fast enough. I wasn't working on a database-backed app though.
Implementing reversal is extra work and bug surface, so it should be subject to cost/benefit analysis.