I've been getting by fine with a 120gb, but I have all writing going somewhere else...
Then again I have six drives aside from the SSD system drive and the smallest of these is a 1.5TB.
Will I upgrade?
I don't need the fastest SSD, but when I get the chance for a 256 of equal speed and quality for $100 or less I'll jump.
Until then I don't believe there is anything broken that I need to fix.
But I will welcome the chance to upgrade for less money