Invoicing is a very sticky service, once businesses are creating their invoices in one system they keep using that system, over and over again.
For the same reason, it is pretty hard to get new customers to use GHL invoicing feature.
We could have an easy way to import invoices from other systems like Invoices 2 go.
This is a technique I have seen other companies doing like clickup making it easy for you to migrate from trello.