In light of some users now hitting that limit, I thought I should post this information.
Anna, be careful here, 80000 fonts could go beyond the supported limit at they might all be font families with only 1 member.
What would be memory reqs? I have under that limit of font families & fonts (not all installed in Windows, just in the manager) and yet my font catalog still seems to regularly crash CD & I have to go back and reinitialize the font database...