Upgraded to KiCad 7.0 and now at 7.0.5. The more I use KiCad the longer it takes to open the PCB Editor. Opened Task Manager and found several instances of KiCad running after the program has been terminated. Checked several hours later, and instances are still there.
Some bad plugins are known to cause this. If you have any, try removing them and see if the issue persists. Also it’s safe to kill those process from task manager.