I am contemplating a similar move, with the corporate class mutual funds in my corporation.
The reason behind it, for me at least, is because I want to finish working professionally in a few years, but I would like to continue to draw down the assets of the company, over ~5 years, to decrease the taxes paid, and to fund my SAHM lifestyle (basically be a back-up to my husband's income, should something happen to his employment in that time, I am the 'breadwinner' right now).
The reason corporate class mutual funds are a thing, is because they generate only capital gains income in the corporation, and not other professional activity income, which makes things simpler and cheaper on the tax end of things (or at least that is how my accountant explained it to me). Please excuse me, I know the ins and outs of personal income tax, but not the business stuff (hence the accountant).