Front ABS sufficient?

Hello, I want to completely exclude the whole discussion for ABS or non-ABS and wanted to know from you whether you consider a front ABS with a 125-300cc scooter (independent of the brand) as sufficient? The front wheel is the main problem when blocking the wheels. But how does the vehicle react when blocking the rear wheel? Is the front ABS sufficient to eliminate most of the brittle situations? Or do you think you should also value ABS with the rear wheel? Is this a maximum braking effect at all? Thank you and LG Pingu