Why bother with RAM_SIZE when RAM_START is all we need?

[RVM]

We are using Segger Embedded Studio with a few different nRF SDKs (15.3.0, 16.0.0. 17.1.0) and MCUs (nRF52810, nRF52832, nRF52840).
We are setting values for RAM_START and RAM_SIZE but I am not seeing any symbolic reference to the RAM_SIZE in any of the program's C or H files.

Are these somehow used in the Assembly files? Or is this purely for the SES Tool to validate any constraints/requirements of the MCU?
Or is this something that can be removed without any (side)-effect?

RVM

[Turbo J]

Stack starts at end of RAM and grows downwards. Should be referenced in the assembly language startup file.

Another user is the linker, which can tell you when you use too much RAM.

[RVM]

I can see how the linker 'could' be using these symbols to guard against RAM usage overflows -- but it is not evident in any documentation that I have come across thus far.

Additionally, I do not see these symbols being used anywhere in the start up files pulled in by the SES IDE for my target build.