[jonwinstanley]

Totally agree. Hiring is the big one for me.

As a business owner, you need to be able to easily find new developers to slot into your team who can get up to speed quickly.

This is much more easily done when your app is something like Rails, Django or Laravel.

[fullstackchris]

Don't you want the engineers who are language agnostic, and have seen many a many framework and can quickly learn any quirks from your existing team?