8. GTDB r220 case study (led by @kassipan.bsky.social ) Applied WitChi to the archaeal GTDB r220 supermatrix: • 5,869 taxa • 55% of columns pruned • Biased taxa: 95.1% → 2.3% • Runtime: <2h on 4 cores → Known clades recovered — without using very complex C60 or CAT models