The best way to do this today is through any crypto exchange that supports USDC. I just tested this - I went in to Robinhood and sent 0.01 USDC to a SOL addres

The best way to do this today is through any crypto exchange that supports USDC. I just tested this - I went in to Robinhood and sent 0.01 USDC to a SOL address. It cost me $0.001 as a transfer fee and took about 30 seconds total. I agree the process could be a bit smoother, but it works fairly well.