Why would you even wish to kill apps? You do not have to, you just jump back to home screen and open apps...I do that all the time...
Once you pass certain number, scrolling through app tray is no longer make,any sense
You are contradicting yourself.
I close apps so it makes sense to use the app tray.
I agree if you don't close apps it doesn't make sense to use the recent app tray and at that point you might as well open an app from the home screens.
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Nope. I use the recently used app list to access recently used apps. If I haven't used an app recently, I access it through the home page (where you find the apps that I use constantly throughout the day.)
By your own description, you waste more time removing apps from the list than you do "scrolling" past them.
I see your point however I guess I use the recent apps differently. I use it for apps I'm constantly opening which is generally recently.
Using the home screen is slow for me due to the amount of apps I have (80 +/-).
The home screens give me two options. Folders or multiple pages of apps. Neither of which is as fast as me keeping a tidy recent app tray.