Bitcoin network will not need the extra capacity of Bitcoin Unlimited as users began migration to other coins, cheaper to transact networks, you know their names.
Please name me a single
viable alternative. By viable I mean the following:
1) Doesn't have an instamine / isn't a scam. (See Dash)
2) Isn't highly centralized / doesn't have a high king. (see Ethereum)
3) Doesn't have even worse scalability issues than Bitcoin. (see Monero)
Monero has no block limits. Yes, the transactions are bigger in bytes ( I think 3 or 4 times bigger), but there's no hard limit. Blocks adapt. Only limited by network capacity and disk size, so following Moore's law.
Problem with monero is that it is not very user friendly. But it doesn't have built-in capacity limits.