Not sure if you've used shortcuts on iOS but a lot of those customizations don't change the performance of anything. The shortcuts on an iphone add a half second each time you use the app, because the icon has to open the shortcuts app THEN open the app the shortcut is linked to.
If adding a sticker to your laptop increased the boot time a fraction of a second some people would still do it, but many would it find it maddening!
If adding a sticker to your laptop increased the boot time a fraction of a second some people would still do it, but many would it find it maddening!