There is nothing that stops them to relaunch attack with modified version. Initial wave will use spam, then worm-like part of the ransomware will penetrate internal networks.
Sure but this generated a lot of press so it made the vuln more known; Microsoft released a patch and systems are likely less vulnerable to the same attack.
Similar attacks using other vulns or tooling are inevitable but this is prob much less impactful and the registration probably mitigated a lot of damage
