API - multiple/bulk contacts upload endpoint

After our constructive dialog and being prompted by mr. Dwight Bussman of the Zendesk team I am reposting this here, in the hopes that it gets some attention by the appropriate people.

The relevant post: https://support.zendesk.com/hc/en-us/community/posts/1260802716109-Bulk-upload-contacts-multiple-contacts-upload

A quick overview of the discussion: I am trying to upload our contacts to Sell (about 100.000 contacts) but on the Sell API there does not exist an efficient automated way to bulk-upload contacts. There seem to be 2 ways available to upload a large number of contacts: 1) by manually importing CSV files, or 2) by using the single-contact API endpoint.

Both ways are discussed in detail in the post above - as a quick recap, the CSV files method apart from being considerably cumbersome is after all not an automated way; and on the other hand the single-contact API endpoint method requires a significant amount of time since every contact requires a separate request.

A use case for such an endpoint could be adding a new field for example, or realizing that there exist inconsistencies between your database and the contacts data on Sell, etc. - i.e. any scenario that would require a bulk upload of contacts, either all of them or a significant amount thereof.

Curious as to why this basic functionality does not yet exist on Sell when it exists on most modern APIs (Zendesk products included, e.g. Zendesk Support), and hoping it will :P