Currently one can delete all transactional data from Company but there are use cases when only archiving Accounting data makes sense for instance when Accounting module goes live in the end.
Please refer this feature request for details: feat: Allow deletion of Accounting Transactions Only · Issue #59588 · frappe/erpnext · GitHub
Would like to know how community members deals with such situations and if the above feature request makes sense.
CC: @jignesh_shah