Is there a timeline of when this feature will become available?

I have had to split imports to deal with this restriction, too, but only rarely.

We currently have around 318,000 utility pole data records, increasing to 350k would make it easy to update current records and give room for future expansion.

Yes, we are impacted by this. We share out the locations and attributes of 60K records in one of our applications and 130K in another. If the threshold were increased, we could update more frequently and more easily. Our ideal number would be a threshold of 150K or more.

This really affects me. I am the only one?