This is what I observe as well. If you have job that really just boils down to hooking up event listeners in java-script and fiddling with html and css until it looks they way the designers want it then experience beyond competency isn't really all that important. On principle, a company should hire an older dev with decades of experience if they're willing to work at rates that reflect the job they're doing. But devs with decades of experience are probably looking for work that is more complex and pays better.
