I am curious about Niri and want to give it a try.
i have not much knowledge of DE, compositors etc… so is it safe to install Niri in my existing Manjaro KDE installation without breaking it?
Running it in kvm/qemu is out of question, because i can’t run spice with 3d acceleration, thanks to nvidia. 
Is it safe to cross the street? No, however it can be if you look both ways first. 
Only you can answer your question once you have done enough research.
reminds me of Mr. Miyagi 
ok, i will stop beeing lazy and do my homework
Just for all peoples convenience, here is the project page:
I guess I’ll take that as a compliment, AlexBoldt-san 
You’re such a karate kidder…
I’ll close the door on my way out…
Using a installation on a USB drive might get you where you want to be, there are some guides on the forum how to do it.
my plan is similar.
i think it’s time to kick win 10 off the hard disk. I haven’t used it for a year. it’s probably broken anyway, because windows had the impudence to start the upgrade during shutdown and after an hour I hard reset the computer in frustration