You're conflating the old 'Iran is N months from a bomb' predictions (which you have good reason to be skeptical of) with documented IAEA stockpiles. Iran had 440.9 kg of 60% highly-enriched U on June 13, 2025 per the final IAEA report, and that is new material, not decades-old, since Iran didn't produce any 60% until April 2021. Iran had no 60% material prior to 2021.

60% enriched material is very highly enriched, it's approximately ~98-99% of the way to weapons grade, in terms of total work required.

Medium-enriched is generally defined as anything in the 10-90% enrichment range. The IAEA is extremely clear that Iran possessed medium-enriched uranium as far back as 2010: https://www.iaea.org/sites/default/files/documents/gov2011-6...

We all know how cascade enrichment works, having 20% or 60% enrichment is still not equivalent to having the bomb. It is directly commensurate to the "Iran is N weeks away from the bomb!" because people are just extrapolating enrichment time without any other metrics included.