There are multiple third party services which use the API to make daily copies of your documents, exporting them as MS Office documents. Yes, this isn't perfect

There are multiple third party services which use the API to make daily copies of your documents, exporting them as MS Office documents. Yes, this isn't perfect, and you can lose some info in the files, it is pretty good for the most part. Nobody shpould be using G Suite without this, IMHO, because this happens too often.