Fix KDE Plasma autostart
I recently switched to KDE Plasma as my main desktop environment. I'm really happy with my decision and have enjoyed the journey so far.
Only one thing was bugging me: when entering the desktop after login, it would freeze up for up to 2 minutes.
It took me a while to realize that the autostart jobs defined in the system settings were the cause. I spent an awfully long time trying to find a fix for this issue but finally came across a great blog post by David Edmundson. He explains how autostart in KDE works, and that by default, systemd is used to handle these autostarts.
Fix
To fix my issue, I only needed to disable the Plasma systemd startup via this command:
kwriteconfig5 --file startkderc --group General --key systemdBoot false