Tor anonymity compromised by law enforcement. Is it still safe to use?

German media report that German law enforcement allegedly de-anonymized Tor users by correlating timing and packet size patterns between entry and exit traffic through long-term monitoring of Tor nodes, achieving multiple successes in one investigation; the technique does not apply to onion services. The Tor Project could not verify the claims, attributing a cited case to a historical guard discovery issue in outdated software lacking Vanguards protections, and the article offers best-practice guidance (e.g., default settings, updates, HTTPS-only, cautious behavior) to reduce deanonymization risk.