Currently, the KDE desktop uses KSysGuard as its system monitor app. It's a tool that I don't think many people have complained about, but the KDE project felt it could be improved and has been working on Plasma System Monitor for some time. The app is still under development, but it's already available in Kubuntu 21.04 Hirsute Hippo, partly because we're talking about an operating system that's still four months away from its stable release.
The app already has a page in the KDE store, available at this link , but if we try to install it from Groovy Gorilla's Discover menu, we get an error. Currently, the only way to try it is by obtaining the source code and performing a manual installation, or—and I haven't tried this—using the KDE Neon Testing version. One thing is clear: the design has changed a lot , so much so that some users might find it a little difficult to get used to, although it's always said that it's easy to get used to something good.
Plasma System Monitor replaces KSysGuard
Compared to KSysGuard, what's expected to be called Plasma System Monitor in Spanish seems one or two generations more modern . The panel is on the left, where we'll see an overview, running applications, history, and active processes, and we can also add more pages. As I mentioned, I wasn't complaining about KSysGuard, but the new app is on another level.
On another note, something less exciting but no less important, Plasma Disks is also available . This tool analyzes the health of your hard drives, and you can find its project page at this link . Basically, starting with Plasma 5.20, which won't arrive on Kubuntu until April 2021 due to dependency issues, the operating system will warn you if your disk is failing. This can help you take action or simply consider replacing it.
Kubuntu has already announced that these two apps are available in the latest Daily Build of Hirsute Hippo , a system that will be officially launched in just over 4 months.