Make a list of all the coins that have already done this bitcoin code base update and ask them for help. I can donate 5 btc.
1. Gulden
2. Litecoin
3. Groestl
Which other coins have done this and I will add to the list?
None of these coins would run into this issue. If we had a single algo we would be good to go. We also are merged with BTC 0.14.0. As far as we know no one else is up to speed with that. LTC is not even fully on par with 0.13.
Can't we just hardfork to segwit?
I just checked the merges of those 3 coins mentioned:
1. Gulden is on par with BTC 0.13.1
2. Litecoin is on par with BTC 0.13.2
3. Groestlcoin is partial on par with BTC 0.14.0 (same like Digibyte). Perhaps that is why they call it BTC 0.13.3