Our system doesn't really require a formal threshold because, if you go by 10 to 15 in each individual region and break up the country into regions, or the four largest provinces, then I think you have a pretty solid, effective threshold, meaning you need this number of votes to be assigned a seat, whether or not there's a formal threshold. Right? There are formal thresholds at the national level, but because this is broken up into regions, you don't need a formal national-level threshold in the same way.
Just as a matter of interest, we tend to think of thresholds as necessary, and perhaps they are for a country like this, but the Netherlands doesn't use one, and it seems to be working pretty well.
I tend to be ambiguous about thresholds.