I'd say it is very practical for hiring, as you will need just 1 or 2 developers that knows JavaScript and (Rails|Laravel|etc..) for every 4 or 5 you'd need oth

I'd say it is very practical for hiring, as you will need just 1 or 2 developers that knows JavaScript and (Rails|Laravel|etc..) for every 4 or 5 you'd need otherwise (some that know JS, some that know backend, and some to coordinate/manage them).