Why is Hubspot Connector versions 4.4.1+ not compatible with Airbyte Versions earlier than 0.64? I am able run the connector with an older Airbyte Version

[richardlam-quotapath]

Note this:
[Link to the Docs]

Context:
We're using

• Airbyte Version 0.50.45, we are in the process of upgrading soon but currently are stuck at this version until we make some refactoring changes.
• HubSpot connector version 4.3.0.

Question:
I just bumped my HubSpot connector version to 4.6.4 (which contains a change we need moving forward) while my Airbyte version is on 0.50.45 and was able to sync data successfully. So why does it specify in the docs that versions 4.4.1 and above will no longer be compatible with Airbyte versions earlier than 0.64 when I was able to run it on my machine?

We need this connector version for our production environment due to the change HubSpot announced that they will be making on Apr 29th.

Thank you for your time!