Me not caring about security fixes means I will continue to use those features without worrying about potential exploits. Video formats aren't going to suddenly change. Apps will still get updated, the system framework will still get updated.
In all my life, I have not once seen an android phone actually exploited. I have read about a lot of them online. But I haven't seen an exploited phone in person. Other than exploits that I have used to gain root access on devices, which all require physical access. Around 18 percent of the current android market share is made up of devices running Android 9 and earlier. Android has 3 billion active devices according to the most recent Google I/O. That's 600 million devices. I imagine I will be fine for the next 4 to 5 years regardless of the security update situation.
I will support phone manufacturers that have proper hardware, like a headphone jack and sd card slot over manufacturers that promise security updates every single time. I will continue to boycott phones that don't have a headphone jack. I will not make my current technology deprecated by design in order to have a supposedly flagship phone/device. We should support decent companies like Sony that don't remove useful features in order to create new revenue streams. I have really nice headphones, any phone manufacturer that removed the headphone jack is encouraging me to generate e-waste in order to use their product.
Right now is a terrible time to judge a phone company, the chip shortage hasn't gone anywhere, international markets are still heavily limited. Sony doesn't seem to be looking into becoming a replacement for LG, it seems to be happy existing in its current niche. The advances in camera technology engineered into Sony phones show it does not plan on going anywhere. I will be very disappointed if Sony leaves the phone business.
There are interesting phone manufacturers that I would like to buy a phone from, but they have essentially zero presence in the US.