The author argues that "timechain" more accurately describes Bitcoin because it emphasizes the fact that Bitcoin is a chronological ledger of transactions.
Blockchain chain together on top of each other which makes it blockchain or block chain or chain of blocks. That is a perfect name it can be called. Not time chain because time can not chain together.
Moreover, one can argue that some software developers find that blockchain is a bad data structure. I mean, a blockchain does have features for its original purpose to solve the double-spending problem in a distributed system, but for general computing or development of distributed applications, it's better to use something else.
Do you know the meaning of double spending? RBF is double spending that people use to increase the fee or cancel a transaction. Because car can lead to accident, should that be the reason we should not use car?