It's true for Zen 1, Zen+ and Zen 2. But they changed it with Zen 3. Latency went up from 40 cycles to 47 cycles, but accessible for single core cache capacity

It's true for Zen 1, Zen+ and Zen 2. But they changed it with Zen 3. Latency went up from 40 cycles to 47 cycles, but accessible for single core cache capacity doubled, and it greatly improved single threaded performance since single-thread now can utilize full CCD l3 cache.