How them being expensive to generate make them less likely to be reorged?
Would an op_return output used as a nonce to make the hash of the
transaction contain some proof of work make the non-coinbase expirable
transaction more secure against reorgs?
I'm afraid your point is irrelevant.
On Sep 19, 2015 4:01 AM, "Luke Dashjr" <luke@dashjr.org> wrote:

> On Thursday, September 17, 2015 7:14:38 PM Jorge Timón via bitcoin-dev
> wrote:
> > As Mark points out this can be made safe by requiring that all the
> outputs
> > of a transaction that can expire have op_maturity/csv/rcltv of 100. That
> > makes them as reorg-safe as coinbase transactions.
>
> Not quite as safe. Remember that mined bitcoins have not only a 100-block
> maturity requirement, but *also* are expensive to generate.
> Mere OP_CHECKMATURITYVERIFY (aka rcltv) has no cost to use...
>
> Luke
>