The complexity and the need to update your methology does not depend on being front or back-end. It depends on the specific project you are working on. You can

The complexity and the need to update your methology does not depend on being front or back-end. It depends on the specific project you are working on. You can be working on an desktop-only internal system or on a system that should support vr, mobile and desktop at the same time. But without the willingness to update your knowhow in the IT (after a mere 14 years of approximately 45 years you have to work) you better think carefully if software development is the right area for you. The rate of change will accelerate even more in the future. The times where you learned in school and worked the same way 45 years is long gone.