Look at that… Alex says assists are slower

@SMERK0R The brake bias needs to be set in a way to use the full braking potential of the front and rear axles. It will never be truly 50/50, as no car has equal potentials front and left.

The front tyres will always have a greater potential for exerting braking torque simply because of the way the load shifts forwards when decelerating.

So even that 50% BB number is purely fictional. Every car class will have a different potential split between front and rear, and every car manufacturer will have a different scale of setting that distribution – meaning a 52% BB at, say, a Ferrari 296 GT3 won't equal the same retarding force at the wheel as a 52% BB on a McLaren 720S Evo.

The same goes for every team on the grid. Even if you catch Alonso setting his BB in a way that shows 52% on the dashboard, that will hardly be the same actual, at-the-wheel split as a Ferrari with Leclerc setting his to 52%.

The proper way to go about it is to set the BB in a way that every wheel gets to the brink of locking up at the same time. That will always entail moving the BB rearwards, because the default setting is always biased towards the front – lock the fronts, you go straight; lock the rear tyres, you spin out.

Setting the BB at 50 in F1 23 is as wasteful as leaving it at the default front-biased value. Whereas in the default you're leaving braking performance at the table by not utilizing the rear tyres to their fullest, by setting it at 50% you're wasting your front tyres – and that is significantly more sinful as their potential is inherently greater.

The sweet spot will probably be somewhere between 53-56%, depending on the scenario. Say you get that right and know that the proper balance for a certain corner is 54% – more than that, the inside front tyre lock up way too early or even both front tyres lock up; lower than that, and the rear gets unmanageably nervous. Running with ABS will be just clearly advantageous, even allowing you to fully expend those rear tyres' grip on stopping the car, but there will come a point where moving the bias even more towards the rear will just be wasteful. 

Then again, we don't really know what those BB values actually mean. They're arbitrary.

All that to say that:

• We have no way to know if what those values in BB actually mean in the game. They're arbitrary.
• No car, from regular road going ones to F1 beauties, will ever run with a true 50-50 split front and rear.
• It tracks that a more rearward BB will have a better performance than whatever the default bias is, but you still need the fronts to have their braking potential exhausted earlier

Now if there's no hard limit for the braking force coded in the game, then yes, I can see why some would think that 50% BB with ABS is miraculous. But that would be functionally the same as 51, 52, 53... or whatever the point is where the front tyres are locking up marginally before the rears.

At a certain point, anything below that BB value will have the very same performance cap: the front axle potential for braking torque.