I started recently with Blender 3.0 and I can watch without any problem tutorials made with Blender 2.8 (3.5 years ago). Now that I'm getting more confident I can even watch tutorials from older versions and follow them without a problem.
And btw, you don't need to learn every new feature. Blender is a incredible versatile and ginormous software and you only need to learn what you need for your specific workflow. I can maybe know 1% of Blender and I'm superhappy with what I'm doing nowadays!
I don’t know about it at a higher level, but the end of the first video of the Blender Guru donut tutorial series for 2.8 involved setting the monkey head on fire, and the instructions were broken by 2.92: what was described would no longer do anything—some kind of baking needed to be invoked manually. That was a part of what made me decide to wait until it was updated. (The other part was that my Surface Book could only barely reach 2fps for something that simple.)
I started recently with Blender 3.0 and I can watch without any problem tutorials made with Blender 2.8 (3.5 years ago). Now that I'm getting more confident I can even watch tutorials from older versions and follow them without a problem.
And btw, you don't need to learn every new feature. Blender is a incredible versatile and ginormous software and you only need to learn what you need for your specific workflow. I can maybe know 1% of Blender and I'm superhappy with what I'm doing nowadays!