I have borates in my pool, keep a TA around 60. I've found that my pH rises to around 7.8 and just stays there for some time, often a couple weeks, then one day it jumps up to 8.0 or even above. It takes a good dose of MA to knock it back down to about 7.6. It then rises once again rather quickly back to 7.8, where it sits again for some time.
Using borates doesn't reduce the amount of acid I use, it just allows me to go much longer between additions. Borates act as a buffer, making it more difficult for the pH to move in either direction.