I think these are the major ones right now (in the open source or non-enterprise world):

Back-end Stack

1. PHP
   • Symfony
   • Laravel
   • CodeIgniter
   • CakePHP
2. Python
   • Django
   • Flask
   • Pylon
3. Node
   • Express
   • Hapi

Front-end stack

1. SPA
   • react
   • angular (1/2)
   • vue.js
   • backbone.js
2. Non-SPA
   • jquery
   • d3.js
3. User Interface
   • Bootstrap
   • TailwindCSS
   • material-ui
   • angular-material
   • primeng

Which among these (back-end + front-end) do you think has the best chance of future-proofing?

I haven't included Java and ASP.NET because they're only used by large enterprises and their market share is minimal in web development.

Then there are some niche back-end stacks too like golang, ruby and erlang but either their share is minuscule or on the decline.