I see a lot of people complaining about how Vega still isn't available, and how the prices have not come down like other cards have. This benchmark by hardware.info gives a hint
Which type of hardware is the most efficient for mining Monero? - Monero Stack Exchange
ROCm RX VEGA hash rates for Cryptonight (linux vs windows) · Issue #325 · RadeonOpenCompute/ROCm · GitHub