If you've paid attention in the last 10 (or even 5) years as a company, and did some pentests and redteams, you've seen how you could be breached, and you took appropriate steps years ago.
A non-shoddy company will have:
- hardened their user endpoints with some sort of modern EDR/detection suite.
- Removed credentials from the network shares (really).
- Made sure random employees are not highly privileged.
- Made sure admin privileges are scoped to admin business roles (DBA admin is not admin on webservers, and vice-versa).
- Made sure everyone is using MFA for truly critical actions and resource access.
- Patched their servers.
- Done some pentests.
This won't stop the random tier 2 breach on some workstation or forgotten server still hooked up on prod/testing, but it will stop the compromise _after_ that first step. So sure, hackers will still shitpost some slack channel dumps, but they won't ransomware your whole workstation fleet...