SHARDS ARE THE BEST ROUTE FORWARD FOR ETHEREUM; THREADS == SHIT PARACHAINS; ETH 2.0 FACILITATES STORING EXECUTION ENVIRONMENTS AS WASM IN THE BEACON CHAIN AS A SOURCE OF TRUTH. THERE IS NOT A BOUND ON WHICH EXECUTION ENVIRONMENTS A SHARD OPERATES UNDER. PARACHAINS ARE BOUND BY THE GOVERNANCE AROUND THEM, WHICH LOCKS YOU INTO ONE EXECUTION ENVIRONMENT