Hello there everyone! Recent elite sub here. Throughout my sub I have been trying to watch starting with solver tools/theory videos to get a solid understanding of the game. I have already began to exhaust the past couple of years of videos and I am worried as I get too far back, the content may not be entirely accurate or unhelpful to my 2022 strategic approach. Is there any way to know what is still relevant? Is a certain amount of time too far back? I imagine especially pre/post-solver domination there is a strong contrast between some strategies.

I would really appreciate any thoughts or perspectives!

EDIT: I am primarily interested in the NLHE content but perspectives on MTTs as well may help others.