Its not going anywhere. Or at least in europe its not.
Symfony et al have matured enough so they are usuable for allmost everything web related and if you dont plan to be the next google homepage, it will carry you VERY far.
Is it pretty? No. Is it efficient? No. But you will be able to find 10 coders for the price of 4, that will have your project iterate until you need something bigger and better. If you do not hate your staff, by then they can easily pick up golang and convert into microservices, taking it down piece by piece and making the parts more efficient that need it.