Replacing the spinner with an SSD will definitely Super Charge any PC. Especially on PC's with low ram, the SSD can really make a huge difference.
With an SSD in place, I upgraded my system from Win-8.1/Pro to Win-11/Pro and never did see any sizeable reduction in performance.
My little Acer Slimline (old) is kind of slow by it's nature, and Win-11 doesn't seem to make it any slower.
Win-11's need for 4+GB of ram is, I've been told, is the reason there will never be an X86 version.
That's OK though, as all my old x86 programs run just fine on this 64 bit OS.