All you need to do is arm that glider, and it is an autonomous long range torpedo.

TeX (and more specifically LaTeX), are far more widely used in the mathematical community than MS Word. Most math departments expect or require you to use LaTeX to write your thesis, and possibly even your homework.

The math community is so deeply invested in TeX and it's associated tools that nobody would bother to switch to MS Word unless it somehow provided a capability that TeX or LaTeX can't, and that is very unlikely.

IBM acquires lots of new workers all the time as part of outsourcing deals. A company decides to use IBM for its IT and/or software development, and (if they're nice) transition their existing employees over to IBM. IBM accepts this as part of the deal, but they have to get rid of some people eventually and because attrition alone isn't enough they periodically lay people off.

It isn't necessarily pretty, but it's essentially part of their current business model.