The engineering requirements for successful micropayments are, in my view:

* support for millions of transactions per second

* very fast, basically instantaneous

* if a small fraction of transactions is dropped randomly, no big deal

* easy, simple, cheap on- and off-ramps

* support for anonymity

* good customer support (lost password, lost device, maybe chargebacks)

* support for local currency

* compatible with local law

* very simple API, easily integrated into browser or other devices

* energy efficient

For those requirements blockchain is a terrible solution.

But sure, you can use a helicopter to open a beer bottle, go ahead.