A few reasons...JS born as a browser extension language.VMs only got 'fast enough' in last 5ish years.Only got libraries for unix processes, ffi, file I/O in last 5 years.
So blogs are boring right?(We're gonna build one anyway.)But I'll never remember all the details off the top of my head so ...
Step 7-9 (left as exercise)7 - Add Devise for authentication.8 - Set up OpenSSL. Cry bitterly.9 - Deploy to Heroku.