Sharp's the word.
What do you think about various ideas of sharding? Could they address this problem? What properties should have a sharding solution in order to be acceptable?
I think that as it is now, there are some fundamental differences between each shard chain; the first one is all the shards don't have the same level of security and the second one is all the shards don't have the same amount of users. This could lead to a situation where we end up with hundreds or thousands of different coins and none of the proposals I've seen have addressed this issue (until someone finds a solution to prevent that I'll remain skeptical). I would say that equal security is what matters to make shard chains work.
I think that in this topic we only consider those changes that will be added with the consent of the entire community.
You're right everyone will not agree on everything but now you have to convince people that using external data into the codes of btc is the best option. We know that it could cause some consensus problems (what if the predictions turned out to be inaccurate and we have to rewrite the codes, how can we agree on the validity of the data in the first place?). Your idea is good in theory but hard to implement. I tried to come up with a simple formula that would make sense for most people and I couldn't find one. Speaking of which what if the amount of space supplied by the network was proportional to the price that the users pay? I think that would make perfect sense...
N: new block size limit
n: old block size limit
T: total of the transaction fees in the new block
t: total of the transaction fees in the previous block
N = n * T / t