A lot of people started counting from grub, you started counting from power button, I guess. Those times can be improved but need to be? Maybe enter LUKS password faster? 
My 6 yo ThinkPad has systemd-analyze:
Startup finished in 7.594s (firmware) + 5.279s (loader) + 2.038s (kernel) + 9.082s (initrd) + 17.458s (userspace) = 41.454s
graphical.target reached after 12.022s in userspace.
Yeah that’s how it works, from power button to Plasma password in under a minute.
Edit: Turned off, and turned it on again:
Startup finished in 7.650s (firmware) + 5.400s (loader) + 2.024s (kernel) + 7.757s (initrd) + 13.247s (userspace) = 36.080s
graphical.target reached after 9.406s in userspace.
My measurement was 40 secs.
I guess I improved my LUKS typing skills a bit 