I have rescued several laptops that were struggling with Windows by installing Linux, and KDE Plasma is excellent these days. My 7 year old Dell XPS, which had become unusably slow and hot under Windows 11 despite repastes and cleaning, runs OpenSUSE Tumbleweed like it's a new machine.
I feel the same about KDE and Windows. I only keep Windows for some music production stuff and legacy .NET application maintenance. The rest of the time I avoid it and use Linux and KDE, a far more pleasant experience.