Ask HN: Should i outsource to react/node or to php/jquery

I have some experience with outsource teams in India, Ukraine and other.

In my experience, the older the tech, the more plentiful the devs.

So i was always able to get fistful of good devs in php/jquery in the Ukraine. But for a new project, the FE lead and designer wants to work with more modern tools. (We can certainly guide and mentor new devs - but that takes times and energy of course).

Can anyone shed light on the availability of devs in outsourcing/remote with the latest&greatest libs ?!