Why install rear disc brakes (RDB) instead of drums?!
This question is mostly asked by people who haven't yet encountered the problems inherent to drum brakes.
This is a fairly old and ancient type of braking system, used since the dawn of the automobile era.
Due to the lack of a suitable alternative, it was initially used universally on all types of transport: trucks, cars, and motorcycles. However, with technological advances, increased top speeds, the number of cars, and traffic on the roads, drums have been replaced by a more sophisticated and reliable disc brake system, better suited for dynamic driving.
Rear disc brakes with an integrated handbrake mechanism eliminate all the drawbacks of drum brake systems and are widely installed on modern vehicles of all classes.
RDBs are characterized by stable and reliable operation, good cooling, and are ideal for all driving conditions. This applies to both high-speed driving with intensive braking cycles and more relaxed driving on rough terrain.
When the pedal is pressed, pressure is applied to the brake pads already resting on the brake discs, thus braking begins immediately following the driver's reaction to the road conditions.
The open brake system allows easy access for monitoring the condition of consumables and proactively preventing malfunctions.
The installation of rear drum brakes on modern cars can only be explained by the manufacturer's desire to profit from expensive trim levels, where rear disc brakes are standard, or from entry-level and mid-range trim levels, where disc brakes are almost always an optional extra.
Therefore, I believe the question of why installing disc brakes instead of drum brakes is completely incorrect.
It would be more correct and appropriate to ask how to install disc brakes instead of drum brakes on a specific car and understand the nuances (whether it's worth it).
If, in your case, there are versions of the car with rear disc brakes, and the modification is possible for a reasonable and reasonable price. Installing a new brake system is a simple and straightforward process, without major modifications to the chassis or suspension.
There's absolutely no reason to resist this useful, functional, and aesthetically pleasing upgrade!