One of the reasons why I prefer to use "cloud" tools instead of LibreOffice is LibreOffice being slow...
Xcode on the MacMini I use to work is just terrible, it is SLOOOOOOOOOOOOW.
I wish I could code for iPhone with TurboC, the thing just worked, no loading time, if I hit a button, it do what I want instantly.
Games are also getting notoriously bad, I've been seeing 2D games, with no particularly important special effects, get extremely slow on my computer (that can run some very beautiful older 3D games easily), Starbound is a very bad offender at this.
But the one that pissed me off, is Epic Games launcher... Shadow Complex is free in december for PC, to get it you install Epic Games launcher, that then downloads and installs it.
My gaming machine is old, and has some parts of it failing, and playing shadow complex tipped it over some edge and now it is overheating easily... at least I thought it was shadow complex fault, I eventually learned it was the launcher's fault, if I close everything and leave only the Epic Launcher open, it uses 100% of my GPU, and make its temperature shoot from 56C to 92C, it is just absurd... it does not even have any 3D on it, I have no idea why it uses the GPU, and why it needs that much GPU power!
I haven't used turboc in over 20 years, but I don't recall it doing things like code completion and refactoring and all the other stuff one expects from a modern ide. (this is not to defend xcode)
That was the past. This is the future. Always improving...