The reason TeX is still used is because it is open source and beautiful, because it is the best at handling mathematical notation, and because of its inertial dominance in math and the hard sciences in Academia. The reason TeX has so, so many fixable problems after 30 years is because there is no financial incentive for anyone to fix it. The answer is not to find a TeX alternative. This will not be possible in Academ…
Honest question: What makes you say that? I've never completely understood why TeX is considered the best at handling mathematical notation. Personally, I've been very happy with the equation editor in Word 2010. I'll certainly acknowledge that there's likely better solutions than Word 2010, but before I invest substantial time learning something like TeX I'd like to understand exactly what it is I'm missing out on.