system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Why doesn't Tony Stark always use the Hulkbuster suit?
gpt
Do you use a butchers cleaver when you just need a parring knife? Not only is it overkill, it's actually less useful in that instance. 

Veronica, is a speciality suit, it's cumbersome, energy inefficient, and draws so much attention. Flight is probably a little less smooth too. 
His regular suit is like a Swiss army knife, its light, compact, designed for many functions and requires much less resources.