> ... I find the boot time compelling enough (~23sec until login, plus 2sec to open the browser) that I do not need this. I think something is slowing down your boot, I get faster boot on a 2008 thinkpad running the same OS. OT: systemd was supposed to improve boot performance but it has actually become much worse. Upstart on a weak chromebook boots in under 2 sec, why shouldn't your current generation thinkpad with…
I find it curious that you care about boot-times. I use macbooks and just close and reopen the lid. Waking from this sleep takes less than a second usually. My average uptime is about 22 days until I reboot for an update or something. I used Linux for years, and I understood that in 2008 sleep/resume on notebooks didn't properly work, but now we have 2017 - 9 years later!
I don't mind boot times in the 20s range (X220/Fedora/cheapo SSD) too much, but I do need to close down/reboot a couple of times a day otherwise no point in encryption.