This is the fault of the bitcoin project, not coinbase. Bitcoin transactions should just work without the end user not having to worry about what's under the ho

This is the fault of the bitcoin project, not coinbase. Bitcoin transactions should just work without the end user not having to worry about what's under the hood. Why the bitcoin client cannot just use segwit / schnorr automatically? Why it doesn't provide a simple API for batching? All that stuff is up to the end user to develop.