I make regular use of Google's office suite. I use Google forms all the time to collect data, Google docs when I have to leave Emacs for document preparation - usually when I have to collaborate with others online and I use Google Sheets as my greadebook.
I don't do a lot of data processing using Google sheets. For that I download the data and write small scripts. On the other hand it turns out that you can do some pretty nifty things by scripting right in Google sheets.
You can also send email from a Google app script. For me this was a big win. I use it for emailing grades to students and also as a poor man's mailmerge. The key call is:
Here's a video walking through sending emails to a list of people from a spreadsheet. The code is underneath.