Solana's Alpenglow upgrade is about to make transactions final in 100-150 milliseconds, down from 12.8 seconds
That's a 100x speed up, faster than your card getting approved at checkout
It replaces two of solana's original systems with a smarter setup that cuts out unnecessary steps and frees up ~75% more space for actual transactions instead of network overhead
98% of validators approved it. It's already being tested. Mainnet expected Q3 2026