In just over a week, a lot of people have come together to discuss how we can make a "simple" change so that bitcoin blocks aren't full anymore.

I think what we should be bothered with is not whether blocks are full, but whether normal txs are served.

As capacity grows, fee requirements drop (no need to use high fees / you try to get your tx in with near zero cost due to overabundance of space).

So as fee requirements drop, one can broadcast millions of txs for peanuts (in terms of tx fees) in order to increase bloat. And he will be able to do that by paying the least amount possible.

The more space you give, the lower the fees will go and the cheaper it will be for the bloat-attacker to perform the attack.

I think the concept of non-full blocks with higher block capacities can work only if it is coupled with a minimum-fee policy that prevents spamming/bloating attacks. Otherwise we are always at the mercy of attackers on whether the blockchain will be bloated or the blocks will be full.

Monero / XMR had an adaptive block size that grows with demand, but when it came under a bloat attack they realized the blockchain would be killed pretty fast. They had to raise the fees immediately to prevent that scenario from happening.