I have an older MacBook Air that unfortunately has 128 GB. For really light uses like writing and stuff, it's usable. I end up relying on iCloud storage a lot, and I have to make sure that whatever I want access to, I've right-clicked the folder and picked "download now" to make sure it's there. I definitely wouldn't spec a new Mac with a 128 GB drive, but I don't think it's a total dealbreaker for being able to use it, provided you aren't working with a lot of big media files. I suppose the exception might be a desktop machine or a machine that lives on a desk and can be plugged into an external hard drive all the time. In that case it doesn't matter as much how big your internal is.I seriously can't imagine how people can survive with 128GB of hard disk in a computer, unless you have an iMac/another computer at home.