Not exactly great for the whole "decentralization" argument, if pressure from the US government is enough to dictate who is and is not allowed to trade bitcoin.
What other options exist for users in Iran? Localbitcoins via Tor or a VPN and buying/selling for cash? Are there other exchanges still operating in Iran? Bisq?
This is a reason why the ecosystem cannot be developed at all.
Because there is still not a clear environment and defined governmental decisions regarding Bitcoin and the crypto industry. If a government shuts down crypto transactions then the system is paralyzed.