Paid services that require billing in unreliable networks. If IOTA had a high quality implementation, it would be really useful I think. (Obviously it suffers s

Paid services that require billing in unreliable networks. If IOTA had a high quality implementation, it would be really useful I think. (Obviously it suffers severe problems, both on the spec and implementation side since years; and they are slow to fix them) On the other hand, I think "standard blockchain" isn't enough. I'm no expert but mainstream blockchain solutions have some not so nice properties: processing power/energy waste, vulnerability to 50% attacks, slow processing. That said, cryptographically signed GDPR conforming Event sourcing might be a good idea. I wonder if that would still count as blockchain though.