I did not know about soft turn signals until I saw this post.
I question why this feature exists. Drivers should be aiming to signal 10 seconds ahead. When making a lane change or turn, you should be keeping your signal on until the maneuver is completed. I can't think of a circumstance where 3 blinks is enough. 1 blink looks more like a mistaken signal.
The point of the blockchain is to achieve distributed consensus of what's in the database. That way, one entity can't unilaterally change what the database says.
If you have a public non-profit institution maintaining the database, obligated to serve all legal customers, with serious consequences for tampering with it, you can get pretty much everything blockchain can do, for a billionth of the computing power.
But with that system, you would lose these features: