Technology does evolve and in some cases it evolves quickly. As an IT/Data professional keeping abreast and up to date of the changes that impact your job is vital to your career success. If you standstill as an IT professional you will get left behind.

I fully agree that you can't learn everything at once and pacing your learning over say the next five years is great idea. Always remembering what you learn today may not be as relevant in five years time.