K8y
de0u Is it OK to remove the battery from a smoke alarm before going to sleep? For any single night it's probably fine. It's less fine as time goes by. The point of a smoke alarm is protecting against a danger.
And in this metaphor the risk can be quantified, known fire hazards in the home can be mitigated, flammable materials stays about the same in a typical home over time.
The case about an outdated phone is worse, in that the risk is now about adversaries with agency, intelligence, technology that for every week gets even more ahead of your outdated device. Technology that may be used to deliberately outsmart yours, with an intention to cause you harm.
And contrary to fire hazards, the risk includes a lot of 'unknown unknowns', and 'hard to quantify'-factors, 'black swan events', deliberate desinformation etc.
Bottom line: I tend to advice, not like 'its up to you', since rather its up to your luck not letting you down, and hope is a proven lousy strategy.