Do you mean the B&R method of limiting the number of concurrent tasks? Not really. In my standard B&R scenario, I'm backing up local to my network, but for backing up 365, the common scenario will be backing up over an Internet connection, which is nearly always slower than LAN, so having more strict controls in place to limit how fast it can go is a must to me. Microsoft or Veeam may be limiting to 40 items/sec, but I'm not guaranteed how large those items will be and what the impact to production will be. By being able to tell the job to never use more than 25 MB/s or some other relevant number, I can be sure I always have bandwidth available.