Most altcoins are Proof of Stake, where mining via computing hashes doesn't take place. "Blockchains" isn't limited to Proof of Work, you can even get non-PoS/PoW blockchains such as Hyperledger.
Do you mean most that aren't autogenerated ones that stop being mined a few months in, or do you mean to include those?
I'm a bit surprised about "most" but if you mean "most that do something" then I could believe that, but I am still surprised.
Do you mean most that aren't autogenerated ones that stop being mined a few months in, or do you mean to include those?
I'm a bit surprised about "most" but if you mean "most that do something" then I could believe that, but I am still surprised.