This hasn't been my experience in practice but I guess it depends on what kinds of companies you've worked with.
Everywhere I've worked, they hire engineers based on a lot of factors, and it has been more often the case that they'd go for someone who knows a different stack really well, than someone who knows all the newest stacks.
Everywhere I've worked, they hire engineers based on a lot of factors, and it has been more often the case that they'd go for someone who knows a different stack really well, than someone who knows all the newest stacks.