You're right, I won't give up SBP. But mainly I backup 1:1 to my NAS, which DO could solve. Also syncing between to folders could be solved (as I have manually to choose each file when syncing between PC and laptop).
Origin idea is to use one tool for all on laptop, PC and USB (I fully included SBP in DO, but I have to update it always on 2-3 devices).
I also try to configure DO that way, that I can use it in ALL environments (mainly screenwidth for toolbars and columns are the problem, all other things are solved using usercommands, variables & relative paths). So that I just need to copy ONE config.