It depends of "software" type you use versus the "hardware": use the proper tools for the job.
My TinyCore versions (all of them 3.x -14.x) booted in 3-15 seconds, and firefox ver. 3.x - 98.x (huge bloated) started in 1-4 seconds. on my old laptops [Atom ... AMD-APU-A6000] with RAM [1-8] GB.
Now on my laptop with Intel CPU [4+8 cores] with RAM= 32 GB and HDD= nvme m.2 ssd: my W11 24H2 (bloated as hell) will COLD boot in 3 seconds; and firefox ver. 130 boots in 1 seconds. Even ArchLinux starts inside WSL2 (Windows System for Linux) in 2 seconds.
It is all because SMP -symmetric multi processing (multi core/ multi processor) and the proper written software to take care of this (like ffmpeg).
Time is money,
time is an expensive/scarce resource in life, etc. So the speed must be prioritized against money. I could make more money spending more time, but I can not make (to much) more time for me on this planet even with advanced medicine discoverers.YMMV. BTW: I am healthy (mind & body), I think
But if we talk about seconds/ minutes we could gain or lost per day because some (not done) software "optimization", then maybe we do not focus on the big picture: Life is what happens when
you're busy making other plans.