Bradley Chambers at 9 to 5 Mac has an article on the latest update to the Backblaze app for Mac. They have increased the threads from 30 to 100 and reduced disk load by 80% which can be nothing but good.
I moved to BackBlaze when my previous backup went corporate only. Now it took me a year to get my backup (and I haven’t backed up most of my video files which are just too big) but I use this and time machine to know that my important files will be safe.
Once you lose a hard drive you will always run a couple of backup solutions and having them run better is always a good thing.