Practice good hygiene and it'll be fine
The trouble is that modern apps are forced to adopt features which depend on the new OS. Your old one will be incompatible, on purpose
The security aspect is secondary to the monetary growth and recuperation of investment in the new OS.
They spent all those monies to make it "AI" betting that you will eat it up and pay up. Now there will be significant pressure for them to "increase adoption" or someone gets fired