I could get behind ₿10,000 as long as it was said out loud as “10,000 sats” or “10,000 satoshis” and have 10,000 bitcoin still be written as 10,000 BTC or 10,000 bitcoin. If you just write 10,000 sats on something, one argument is those who have heard of bitcoin might still have no idea what ‘sats’ are. Standardizing the ₿ symbol for sats might be the happy middle ground.