user28219: The proof-of-work solution is simple but has many drawbacks (waste of time, energy and uncertainties about its security in the future).
The consensus solutions proposed by Ripple/Stellar are too complex, and with complexity also comes uncertainty/risk. (See Stellar catastrophic failure!)
What do you think are the chances of someone coming with a simpler solution, out of the box, something much more straightforward that no-one has thought about it?

user5406: The double-spending problem had been unsolved in decentralized protocols for decades. It seems unlikely that a second (different) solution would suddenly materialize.
It never was a problem in centralized setups, where the central entity would provide a referee function.

28219: <p>The proof-of-work solution is simple but has many drawbacks (waste of time, energy and uncertainties about its security in the future).</p>

<p>The consensus solutions proposed by Ripple/Stellar are too complex, and with complexity also comes uncertainty/risk. (See Stellar catastrophic failure!)</p>

<p>What do you think are the chances of someone coming with a simpler solution, out of the box, something much more straightforward that no-one has thought about it?</p>
 5406: <p>The double-spending problem had been unsolved in decentralized protocols for decades. It seems unlikely that a second (different) solution would suddenly materialize.</p>

<p>It never was a problem in centralized setups, where the central entity would provide a referee function.</p>
