Not how much experience you claim to have.

Experience is worth a lot. Even idiots with a lot of experience can be very good at something. Smarter people need less experience to be good at something - but they still need it. As for changing technology - IT changes but the principles remain the same. Plus there's a lot of soft skills that never change. Being able to talk to people, manage expectations, guide clients in the right directions, etc.. That's worth a lot more in the long term than being up to date with every new tool or framework.