The Knife brushes (KnifeCurve, KnifeLasso) received a substantial stability patch. Previously, cutting through high-density meshes could lead to a 30-second freeze. In 2022.08, the algorithm has been optimized to process cuts almost instantly, even on subdivision level 6 or 7.
If your goal is to to other software (circa August 2022 or later), use: zbrush 202208 link
The 2022.0.8 update focuses on stability and quality‑of‑life fixes. Key improvements from the official release notes include: The Knife brushes (KnifeCurve