In my opinion, it will not significantly affect the crypto space as these coins practically have the same value. The move to consolidate trading pairs is also good since traders will converge into BUSD pairs hence more liquidity, better spread, depth, etc. At the moment they will still support USDT though since it has a bigger market share, but I won't be surprised if they remove USDT as well in the near future, considering I also use more BUSD (with cheap Smart Chain) instead of USDT recently.