[intsunny]

For many of us its sheer laziness and its been this way for a long time. GOOG is faster to type than Google. (This is especially true for MSFT.)

[bdcravens]

I remember MSFT being a common reference on Slashdot way back when.

[jshevek]

I like that it is more accurate than saying Google ( it's Alphabet now after all), while still using a reference we are familiar with.