So true.
Few anecdotal experiences.
Visual Studio 2008 (express), installation space required was few hundred megs. You clicked on a .cpp file and the IDE would launch immediately.
Today you have Visual Studio 2015, which requires +10gb of space and takes so fricken long time to launch that if you double click on that same .cpp file now, by the time the IDE launches you're already 10 minutes into some other task and have already forgotten why that IDE opens up now.
Another example, Windows XP. Heck, you can just install it in a VM today for example, give it half a gig of ram and boot it. And observe, it's blitzing fast! From boot to login takes no time!
Try the same with Win10. "Preparing to login in, please wait", "please wait this", "please wait that", "preparing to configure this/that", etc. blah blah and for what?
Is there something that I couldn't do in WinXP that I can now do in Win10? How about VS? Honestly I don't know, I'm doing all the same computational tasks now that I was doing back in the WinXP era.
And the Open Source Linux community is not redeemed either. Anyone tried any recent Ubuntu with Unity. The master of sluggishness.
Thank god you can always still install ArchLinux + Fluxbox and not deal with the bloat.