Absolutely!
The only people NodeJS / React / AngularJS / the Javascript Framework Wars mean anything to are startups that want to be fancy; programmers that want to be fancy or people that want to learn those frameworks.
You cannot trump the power of SQL - be it MySQL or Postgres or Oracle or SQL Server or etc...
Anyone freelancing and using Wordpress - yes, still incredible relevant.
Any web development shop - the kind you call to build you a website for your restaurant or small business - yes, still relevant.
Corporate work? If they are not using Java (not javascript) they are using PHP (or rails).
It's still wildly compatible with most if not all 3rd party services - Mailgun, Cloudinary, Stripe and others.
It can make cron jobs super easy - php myscript.php from the command line and done and done.
Your customers - don't care if the website uses React or AJS or whatever. They care that it works / fit their budget and can be maintained / upgraded easily. And as much as everyone and their mother might be trying to learn JS frameworks - there are many many more programmers that can jump right into a PHP program and pickup where the old programmers left of.
Frameworks come and go - PHP / Rails / Python are established languages that are here to stay for a long time, IMO.
Cliff Rowley
Thinker, Tinkererer, Dork.