Not if you've built your product around a front-end framework that's gone out of style.

Remote workers are good for this scenario. My current employer is maintaining an outdated backbone.js app, thankfully I'm not on that team.

We have one guy in the office responsible for all of it, as warm bodies with backbone experience are impossible to find. However, should we decide to employ remote workers, we can easily find developers with backbone.js experience from Romania, Lithuania, India, and Pakistan who would work for a pittance and be grateful for the opportunity.