Ironically (because related to Google), I feel that the constant churn of web development is what makes these older devices unusable.
I have several devices from early to mid 2010's, and the real reason these devices are annoying to unbearable to impossible to use (assuming Linux or Windows for security updates) is that they become very slow while just browsing the web or simply playing a video with a newer codec that has no hardware support on these older machines.
In my mind, this 10 years of updates is fantastic, but also not very practical towards the end of the support cycle. Better to have the option, though.
I have several devices from early to mid 2010's, and the real reason these devices are annoying to unbearable to impossible to use (assuming Linux or Windows for security updates) is that they become very slow while just browsing the web or simply playing a video with a newer codec that has no hardware support on these older machines.
In my mind, this 10 years of updates is fantastic, but also not very practical towards the end of the support cycle. Better to have the option, though.