This is a good question Xantippos.
Long time ago I ask me the same.
Bramble 15 describe very well the same way I do.
Clean it simply with water. And dry it at a paper towel made for the kitchen. Tow the brush with a soft touch over the towel so that all hairs can get back in the right order.That`s it.
I have read that after cleaning the brush with water you should store it with the brush side down in the water. But the brush do not touch the bottom. So you have to clamp the brush.
The few pigments still in the brush can`t dry. Best way they get loose during the night.
This sound very good and logic. But not very handy.
After the cleaning process I store my brushes in an old cup. (A good one beside the handle was broken off.) With the brush up into the air.
But the pigments who survive the cleaning process go down to the base of the brush and dry.
Make the brush with the time hard.
There is a live span of good quality brushing.
You can stretch it to avoid dry brushing with it.
Conclusion:
Every brush is a wear and tear part !
If you paint a lot, you wear it a lot.