It’d never happen. Why would they throw away hundreds of man years of effort?
Frankly, the financial case for writing such niche software in the first place is pretty marginal…to rewrite it? Insanity.
As things are, the team seem to be on top of their game, churning out reliable and regular updates with hundreds of new features and fixes. Changing to a language that they would be less familiar with, would be counter-productive.