TFT library success for 1.8 inch TFT

I have had success using the excellent Bodmer library (TFT_7735) for displaying text on a 1.8 inch TFT. Previous to that I failed to get this display working using the Adafruit-ST7735 and Adafruit-GFX libraries.
I was also very impressed by the descriptive documentation by Bodmer with the example TFT_Print_Test.

My impression is that the Adafruit libraries are tailored to suit their particular hardware. Am I correct in this assumption?

I acknowledge that the Bodmer library was based on those Adafruit libraries.