system
Given the following post, respond as if you're commenting on Reddit:
human
[W40K] given the rapid technological advancement of the town do you think that they will be able to (1)Survive and (2)Fix the problems of the Galaxy through advanced technology?

Of course at present the Tau pose absolutely no threat to the Imperium. However the nature of technology is that as it advances the radar advancement in to accelerate. How advanced are computers are in the real world today versus 30 years ago. Less than a century passed between first powered flight and landing on the moon.  Tau technology seems to be highly resistant to Chaos, there and don't seem to constantly go rouge.

This question also assumes that their advancement is not simply due to the Eldar secretly uplifting them, a popular theory.
gpt
I doubt it. While it can be argued that Tau tech is all-around more advanced than that of the Imperium, they are missing a truly necessary part of the puzzle; they lack scale. 

The Imperium spans millions of worlds, with many trillions of citizens. The Imperial Guard section of the military contains billions of soldiers, just by itself. Chaos has a presence throughout the entire Galaxy, and as long as there are sentient beings, it cannot truly be "defeated". The Necrons probably have a few trillion combatants, all with ancient weapons far more powerful than a majority of what the rest of the Galaxy has to offer (they've just gotta wake up). The Orks, regardless of their technological inferiority, are one of the most consistently dangerous forces around for everybody, and their reproduction through spores keeps them going indefinitely. The Tyranids are the single biggest threat to everything in the Galaxy. And while the Eldar are really lacking in sheer numbers, their tech is far more advanced than the Tau. 

It will take millennia for the Tau to raise their numbers enough, and colonize/conquer enough worlds to be a real threat to anyone. This also raises a problem for their overall longevity, given that their faction, more and more, has been having its population padded with converts of other races. To be a truly dangerous, unified force, they would have to ensure that their Tau population consistently outpaces their acquisition of "outsiders", otherwise they'll probably end up with a fractured empire full of infighting. 

Something truly unexpected and miraculous has to happen with the Tau soon if they will have any chance of being a real, meaningful player in the Galaxy. So far, their only advantage, is their general lack of a Warp presence, but even that advantage comes with some caveats, and can be easily nullified by their converts.