When I was younger, we all had to memorize phone numbers. I still remember those numbers (even the defunct ones) but I haven't learned a single new number since getting a cellphone.

When I was younger, I had to memorize how to drive to work/the grocery store/new jersey. I still remember those routes but I haven't learned a single new route since getting a smartphone.

Are we ready to stop learning as programmers? I certainly am not and it sounds like you aren't either. I'll let myself plateau when I retire or move into management. Until then, every night debugging and experimenting has been building upon every previous night debugging and experimenting, ceaselessly progressing towards mastery.