For example, I only buy/use old high-end (for their day) business class laptops and put linux on them. They work for everything I need to write and surf.
I also bought an iPhone that was already a few years old and plan to keep it until it stops getting security updates from Apple. I also moved from Android to Apple not because I like iPhones better (I don’t, really), but because the years of security updates (versus maybe one or two, on Android) matters to me.
I have a Pixel 3a that has CalyxOS on it and it still gets updates. I see no need to replace it until that changes.
No new phone for me until they make a pixel with a headphone jack
I’m still waiting for headphone jacks to come back. My ancient iPad has one, and everything since does not. Which means when this one dies I won’t be replacing it (decided I will just use only what my laptop will do).
For my iPhone (which is new enough that it doesn’t have a headphone jack, I limit it to just texts and phone calls, and do everything else from my computer or a cheap little MP3 player.