Hello there!
I noticed that there will be a “Row change history” feature added to the roadmap for 2023 in the Premium and Enterprise plans. In my opinion, it would be a good idea to implement this feature partially in the free plan as well, perhaps with limited functionality, such as allowing only one month of history.
As an example, Airtable already provides this feature on their free plan, as seen here: Record-level Revision History - Overview | Airtable Support.