Hello.
I would like to install Debian 10 with the KDE Plasma task
on a PC with 4 GB of RAM and Intel Core 2 Duo E6550 @ 2.33 GHz,
it doesn't have a GPU.
Do you think it would run without problems
or would it be slow and laggy?
Thanks in advance for your answers.
If you have the drive-space for it, install it, along with something lighter like Cinnamon or LXQt.
Then all it takes to switch between the alternatives is to log out, find the settings icon on your login manager, select your alternative, and log back in.
If KDE proves to be too sluggish, log out/in, switching to a leaner alternative.
You can install and try dozens of alternatives.