Dedoimedo published a review on Manjaro Plasma 20.04 on the Raspberry Pi 4.
Raspberry Pi 4 & Manjaro Plasma 20.04 - Jolly good?
Review of Manjaro Plasma 20.04 on Raspberry Pi 4, including first-boot setup, broken system updates and relevant fix, video performance in Firefox and Chromium, hardware acceleration and problems with VLC and SMPlayer, LibreOffice theming, speed, responsiveness, heating, Wireless network throughput, ergonomics, other observations, and more
Raspberry Pi 4 & Manjaro Plasma 20.04 - Jolly good?