The Kaspa Network ( kaspa.org ) has been running at 1 block per second without a hiccup for over three years. Testnet 11 has been running for many months at 10 blocks per second. Incremental improvements on this testnet have been implemented and while a date for the hard fork has yet to be announced the general consensus is it will be the first half of 2025.
Kaspa seems to still be a fairly little-known project since there are likely no more than about 150K people in the world who even OWN any Kaspa. When the 10 blocks per second hard fork happens that should draw significant attention as it will surpass its OWN record of being the fastest POW coin in the world by a factor of TEN.
Kaspa was created by a team who have a rich background in crypto and have been cited in numerous white papers for their contribution to the overall crypto space. It uses a unique BlockDAG structure that allows for blocks to be ordered even if they were presented to the network 'out of sequence' or in parallel.
I think people are sleeping on Kaspa due to its initial meteoric rise in the first 2 years resulting a year 3 of essentially no price appreciation despite HEAVY developmental progress.
The 'graph inspector' for Testnet 11 can be viewed here in real time, running TEN blocks per second. http://104.11.218.91:8080/?fbclid=IwZXh0bgNhZW0CMTEAAR0dSFdlvHPrQxJg45-yPavzs6AuAJop9r_aNTd13kS-joVkkqLO1nbhexE_aem_Acd2dfwMMx009AbwHaNs6JHtgHVb_rE3Gwpw4a6MYcJGngG94OcPHduh2xxV2NIOZARvZ_mh5EDRU1yFv-zrgTSs