A friend wants to degoogle his phone, so I suggested the OS I'm currently using. The one we can't talk about... He wants a small/compact phone, so I suggested pixel 4a (not buying second hand though), but I'm afraid that planned obsolescence may kill the phone rather soon. What's your opinion?
Used Pixel 6, 6 Pro, 7 and 7 Pro can be found for reasonable prices these days. One of those in good condition would be a better buy because you'll still get security patches for a while. Last time I looked, the third party OSs for Pixel phones only supported them for as long as Google did.