- What was a proposed alternative to Segwit?
An alternative was to simply double the block size from 1mb to 2mb, Resistance to SegWit was one of the factors behind the development of bitcoin cash, a fork of the bitcoin network which chose to implement a larger block size limit rather than rely on a new transaction structure.
- What did Segwit solve more than just the scaling issue?
SegWit fixed the whole security of bitcoin,by solving transaction malleability, by removing the signature data from the transaction blockchain and storing it separately. This prevents any fraudulent alteration of the transaction ID of unconfirmed transactions.
- How is Segwit and the Lightning network connected?
The SegWit update facilitated the development of second layer protocols,such as the lightning network, it couldn’t be done before as there was the risk of transaction alterations at the unconfirmed stage, ie transaction malleability, the new structure means even more projects can be built onto the blockchain giving more scalability and scope of uses in the future.
- Are people, wallets and other services forced to use Segwit?
People, wallets and other services are not forced to use Segwit because it is still compatible with the old protocol, segwit is actually known as an update or soft fork so old addresses and transactions can still be used as normal.