Autoremove old kernel from /boot - this might look nice on "paper" however I have significant issues on latest LTS with any version of kernel 4.8 and 4.10 where I can't ever get to desktop, so I have to stick with 4.4 (Broadwell Core M ultrabook). If a reliable kernel is gone, I might not be able to boot unless I prepare an emergency USB stick and carry it with me all the time...