Parallel (concurrent) invocation of rsync?

[rossica]

I'm considering a feature which would allow multiple instances of RSync to run, speeding up the entire backup. I have many folders backing up, and some of them are larger/have more churn, than the others. Since Rsync is pretty low bandwidth (about 13 MB/s on my network), and my NAS has much more disk capacity, allowing multiple instances to work on different directories could save time.
I was looking at this answer as a way because it doesn't require extra software:
https://stackoverflow.com/a/46611168

Would you accept this feature if it were coded?