The decentralized Solana network is currently capable of over 50k TPS 24/7 in the live Beta with a target transaction finality speed of 30ms round trip from your browser/device. Their unofficial moto is "DeFi at Nasdaq Speed." Solana is nascent and will likely reach 10M+ TPS and 10ms finality within a couple years time.
Decentralized Acyclic Graph based networks (e.g. Hashigraph, which are not technically blockchains) can reach effectively infinite TPS but suffer in time to finality.
Solana is a blockchain with zero downtown (and a Turing complete smartchain), mind you-- nota centralized exchange.
