Earlier quoted context omitted.
Stronger yet I rarely reboot my systems. Either they run 24/7 or I put them to sleep. There’s definitely good use for these optimized tools. Especially on old systems with low resources and slow CPU’s. I generally like the simplicity of suckless tools. dmenu together with i3 is a nice duo.
You have working sleep? Man I'm so jealous.
Suspend to RAM does not work for you?!
What distro do you use and what kernel? What do the files /sys/power/state and /sys/power/mem_sleep contain? Maybe it's just a SystemD issue?