Mageia forum

Just curious...how close are we to Mageia 10 alpha?

Hard to say.
A mass rebuild of all packages is making good progress: https://ml.mageia.org/l/arc/dev/2025-07/msg00004.html
Also here's a summary of the last developer meeting at the start of this month, including a bullet point on ISO building: https://ml.mageia.org/l/arc/dev/2025-07/msg00145.html
For further progress better check on the dev mailing list directly.