The original proposal: https://github.com/luke-jr/bips/blob/bip-blksize/bip-blksize.mediawiki
It's a 17.7% annual increase, with the following caveats:
- It reduces the max blocksize below 1MB, if activated before 6/2024.
- It increases the max blocksize above 1MB only after that date.
I propose the following changes
- Keep max blocksize at 1MB until 1/2019
- Start increasing the max blocksize after that date.
To illustrate what that would mean for bitcoin I made this chart.
The blue line shows the actual max. blocksize.
The red line shows the "effective blocksize" in terms of what it means for transaction capacity comparable to today's blocksize bytes, with the following assumptions:
- SegWit get's activated in 1/2018 and increases efficiency by 110% (latest estimate I know, based on current usage data)
- Schnorr signatures go live in 1/2019 and increase efficiency by another 40% (Eric Lombrozo's estimate)
I think any proposal based on /u/luke-jr's BIP is to be viewed as the new baseline, replacing the 1MB hardcoded limit, and not something that's necessarily set in stone for the next 40 years.