This is lamentable and I'd love to see longer periods of support for older devices, but I'm not sure what the ideal state is - beyond being able to install your

This is lamentable and I'd love to see longer periods of support for older devices, but I'm not sure what the ideal state is - beyond being able to install your own OS on your device, which will still require some level of support from someone. What's reasonable - 5 years of support? 10?