IEEE membership is worth it, if you value being a member of professional organizations, the opportunities for networking, and having a personal library of magazines from the IEEE Societies.
Similarly, ACM membership and the Special Interest Groups.
Financially, ignoring any sentimental value, it likely isn't worth it unless you are a student or work somewhere that pays for your membership. There are occasionally conferences or seminars that you'll find worth attending that will come at a reduced (or no) cost.
If you value being an active professional, then IEEE (or ACM) have plenty of volunteer roles that span public speaking, administration, standards body, or if you are so inclined and experienced, executive level work.
Similarly, ACM membership and the Special Interest Groups.
Financially, ignoring any sentimental value, it likely isn't worth it unless you are a student or work somewhere that pays for your membership. There are occasionally conferences or seminars that you'll find worth attending that will come at a reduced (or no) cost.
If you value being an active professional, then IEEE (or ACM) have plenty of volunteer roles that span public speaking, administration, standards body, or if you are so inclined and experienced, executive level work.