Ten times the block size seems like scarcity is banished far into the future in one huge jump.

Even just doubling it is a massive increase, especially while blocks are typically still far from full.

Thus to me it seems better never to more than double it in any one jump.

If relating those doublings to the halvings of block-subsidy it too slow a rate of increase then maybe use Moore's Law or thereabouts, increasing by 50% yearly or by 100% every eighteen months.

It is hard to feel like there is anywhere close to being a "need" for more space when I have never yet ever had to pay a fee to transfer bitcoins.

-MarkM-