user14726: I just read Why do small transactions without fees ever get processed? and it made me wonder about the risk that a legitimate, lock_timed transaction might not be processed once the lock_time is past.
I'm aware (from the above question) that in the reference implementation, the increasing age of a transaction (in the mempool once it's been submitted?) should increase its priority regardless of the its fees but not every miner is willing to process low(/no) fee transactions even now never mind what they may (not) do in future.
So if I have a signed transaction with a (very!) distant lock_time and it has fees that were considered reasonable at the time that the transaction was created and then when I submit it after lock_time what is the risk that no miners will process it because its fees are subsequently considered to be too low to bother with it?

user14149: If that does happen, all you need to do is spend your unconfirmed transaction's output with a sufficient fee. A "sufficiently greedy miner" will process both transactions just to get the fee of the latter.

14726: <p>I just read <a href="https://bitcoin.stackexchange.com/questions/3872/why-do-small-transactions-without-fees-ever-get-processed">Why do small transactions without fees ever get processed?</a> and it made me wonder about the risk that a legitimate, lock_timed transaction might not be processed once the lock_time is past.</p>

<p>I'm aware (from the above question) that in the reference implementation, the increasing age of a transaction (in the mempool once it's been submitted?) should increase its priority regardless of the its fees but not every miner is willing to process low(/no) fee transactions even now never mind what they may (not) do in future.</p>

<p>So if I have a signed transaction with a (very!) distant lock_time and it has fees that were considered reasonable at the time that the transaction was created and then when I submit it after lock_time what is the risk that no miners will process it because its fees are <em>subsequently</em> considered to be too low to bother with it?</p>
 14149: <p>If that does happen, all you need to do is spend your unconfirmed transaction's output with a sufficient fee. A "sufficiently greedy miner" will process both transactions just to get the fee of the latter.</p>
