I take the name App Switcher pretty literally - I use it for switching between apps I'm actively using/multi-tasking - let's say if I need to copy/paste between apps. When I'm mono-tasking I use the Home screen.
Since App Switcher arranges apps based on most recently used to least recently used, I don't find much in the way of clutter - I'm not swiping left/right very far before I find the desired app.
The only time I'll close-out apps from App Switcher is if either a particular app is misbehaving, or the entire system is misbehaving. Since misbehavior is infrequent (even though my aging iPhone X is running iOS 15.1.1), taking the time on, say, a daily basis to routinely close apps (in hopes of preventing future misbehavior) seems more trouble than it's worth.
Since App Switcher arranges apps based on most recently used to least recently used, I don't find much in the way of clutter - I'm not swiping left/right very far before I find the desired app.
The only time I'll close-out apps from App Switcher is if either a particular app is misbehaving, or the entire system is misbehaving. Since misbehavior is infrequent (even though my aging iPhone X is running iOS 15.1.1), taking the time on, say, a daily basis to routinely close apps (in hopes of preventing future misbehavior) seems more trouble than it's worth.