The cloud only increases your attack surface
NEVER Ever use a cloud vendors sw, Lock in is lock in. Once you are locked in you have no negotiation ability.
Systems are cheaper than ever. You can afford your local critical infrastructure.
you can even aford a remote hot site. AWS... get the hw cheaper but do not pass on the savings.
You can keep test ,,, and research in the cloud.
The cloud can only increase your security attack surface and offers many more attack vectors to security.
Maintain local backups that are offline to mitigate ransomware attacks. Backup the backups to the cloud.