Why would there be throttling? A WCU is 1KB per second.
They initially implemented capacity units to be spread evenly at the partition level and now they have finally implemented it to work at the table level (which is how they sell it and how they talk about it).
Big whoop, you still have to ask daddy if you want to write at more than 80MB/s per account.
Normally, you just write to a data store until it's done. The faster the disks the less time it takes.
Now, writes can "fail" so you need to wait/retry or put it back on a queue to reprocess when you have write units available (both of those and the associated logging will cost you $ on AWS).