For some that may be a benefit, I guess......
But I always keep my iPhone cleaned out......I don't keep unnecessary apps or other junk, I call it house cleaning and do it every couple of months.
If there was a glaring benefit to do it I might consider.......but to manually install all the apps I use and have to go through all the insane amount of settings/alerts/notifications/etc would be an huge undertaking.
I have my iPhone working the way I want it now......my main reason for an upgrade is Battery life and RAM.