Yeah, well, I’m speaking out of real experience with the mod system BOTH as a former student and a parent.
Took Geometry the first 3 mods of my freshman year. The gap for me was not a factor. My math education under the module system was more than adequate preparation for engineering school.
Took foreign language for 2 double block mods per year for 4 years. Also did a mod off campus in an exchange program. I was far more fluent in college than my peers who had taken 4 conventional years of foreign language.
My non-math kid take advantage of the scheduling flexibility of the mod system to take 2 years of math classes in one year.
My impression is that my kid’s foreign language education has suffered a bit due to COVID, rather than the mod system. Virtual and blended learning is tough. Among other things. But this year my kid was able to spend a mod abroad, so I’m optimistic.
It’s not for everyone. But no system works for everyone.