I put everyone on Macs (or iPads, depending on use cases) and iPhones. Have had no malware issues. For those who are older and need robust tech support handholding, I pay for AppleCare so they get unlimited Genius Bar support.
Macs and chromebooks are the way to go for nontechnical family members. Of course we now have scam apps that are trying to spoof iOS native applications to try and get one to download something from the App Store.