Developers and package maintainers who insist on letting their install/update routine display progress from 0-99%, then force us to wait while the screen says 100% can eat the biggest, neverending lots of shit It's especially bad when the wait at 100% is literally longer than 0-99.

100% is complete, full stop. There is no pther explanation.

100% done does not mean I should be waiting any longer. It's done, that's kind of the point.

99%? Sure I'll wait, but don't ever change it to 100% until it's actually done, you fuckfaces.