But if you had picked any other tool from 2014, you'd probably also be stuck with a legacy code base now, without any clear transition path except a big bang re

But if you had picked any other tool from 2014, you'd probably also be stuck with a legacy code base now, without any clear transition path except a big bang rewrite. You would have probably picked angularjs or backbone back in 2014 and a switch to react would have been even more trouble. Meteor allows you to mix blaze & react, mix atmosphere & npm packages, mix their old module systems with commonjs and ES6 modules. We made the same transition, but just replacing one package/ui part at a time when it suited us, so we always kept releasing new features each sprint while gradually modernizing our code base.