Any other way to scale Bitcoin, even if theoretically sound, hasn't been battle tested for years like Bitcoin.
2. Because adoption will be hampered if we don't, and we never know when the next big adoption wave will come.
3. Bigger blocks = More transactions = more fees = more security
4. Because the blocksize limit was supposed to be a spam measure only. Having any blocksize limit at all is already a compromise.
5. Related to #4: Blocksize shouldn't be part of the consensus layer anyway. Let the miners sort it out.
6. Blocks are close to .5 MB on average and have doubled in the last 12 months and unless the trend changes,
we'll be completely out of room in another year.
You are tight about all of the points above. But all of these 6 points = centralization. I was and still am for the bigger blocks, but reading more and more, this centralization thing keeps bugging me even more, especially because we are already centralized enough (60% of our mining is based in China).
I don't know what to think anymore, I think the best would just be to stop thinking about everything and hope for some miracle solution by the devs!
Offchain scaling adds more centralization than anything else IMO, because its introducing reliance on third party services just for normal transactions.
Lightning is going to introduce trusted supernodes. Follow ScalingBitcoin for more details...
Trusted supernodes.