I was at my parents this week and my dad said his tablet got slow.
I checked the running apps and open tabs and the phone couldn't even express it in a number (normally it does up to 999).
Then I hit the clear background apps button and the thing just straight up spazed straight to a full cold boot.
An hour later, dad said it was much much faster now, but that I "removed his apps". (I didn't and they were still there, just not running all the time!)
When my dad had a desktop, for some reason beyond my comprehension, he’d seemingly download every toolbar offered to him. Opening up his internet browser on desktop and literally half of the screen was just toolbars.
He also insisted that I not touch it because he needed them.
I still vividly remember when I was young that my dad blamed any and all computer problems on the fact that I downloaded Steam on the family PC. Couldn't possibly be because of the 20 "free" "antivirus" programs he downloaded.
Had someone complain to me why their home PC was running impossibly slow. Long story short, they had paid versions of McAfee and Norton running at the same time as Stopzilla
That reminded me of a time at work where some testing on our project required opening some large XML files. We were using Notepad++ to open them and format them so we could easily examine them. My boss complained about how bad Notepad++ sucked because it was sooooo slooooow to open.
I checked his computer and it turned out that while he would close Notepad++, he never actually closed the file tabs. So every time he opened a new file, it was adding to the hundreds of open XML files. He was literally opening several GBs of XML files every time he launched the app. Frankly, it made me even more impressed with Notepad++ because I would have assumed most other apps would've been crushed.