There are no safe operating systems; With the shifting landscape of cyber security, There are a host of problems for even Apple:
CVEs and Security Vulnerabilities - OpenCVE and these are just the ones that have been reported.
The whole thought process that "I don't need to update because my operating system is built on this ideology"... It's like using port 8022 with no security, when you should be using 22 and being more secure with your efforts to use it.
Each user has to weigh the risk that they are vulnerable against what they need to do and how they need to do it.
For some of us, the risk is very low. For others the "Give-a-Dam" sentiment is low.
O, Be Wise.