What improvements do you like? I have not tried w11 yet or read change log so I’m a bit clueless.
There are a few baseline/kernel improvements(core/thread scheduling, memory management, storage device caching and access scheduling, etc.) but then there are the UI improvements. Some say they think it looks the same. I say they're silly or need to take a closer look. Compared to Windows 10, it looks better, is a more smooth experience and the settings & options have been better organized/ are more intuitive. Even the Start Menu has been better refined.
Make no mistake, Windows 7 is far & away the better UI experience! But Windows 11 is not bad. Certainly better than Windows 10.
I have not tried w11 yet or read change log so I’m a bit clueless.
My suggestion, don't listen to anyone's advice but your own as to whether or not one is better than the other. As my above opinion clearly shows, how "good" or "better" it might be is a completely subjective viewpoint. Some like it, some don't.
Best way to find out how you feel is to try it out for yourself. Use a spare drive if you want to keep your current install untouched(if you want tips on how to try it out without messing up your current install, chime and I'll help you do it.) install and give it an honest go for a few weeks. First impressions can sometimes be misleading, so you have to dig in and get to know it.
No reason though for 10 GB of ram to be used for minimal apps open.
Everyone here can agree on that. Something hinky is going on with your system.