Why aren't early opening moves generally given exclamation marks? As the title above, why aren't early opening moves generally given exclamation marks? I see question marks for obvious opening mistakes from time to time, e.g. 1.e4 e5 2.Nf3 f6? or 1.d4 d5 2.Nf3 Bg4?! But I almost never see exclamation marks for early strong opening moves. For example, after 1.d4 d5 2.c4 should be given an exclamation mark, being obviously a strong move, already challenging Black's center at move 2, or, 1.e4 e5 2.Nf3 Nc6 3.Bb5! the Ruy Lopez being considered the best way to challenge Black's center already at move 3, and so on...
Wikipedia says the following:

Exclamation points (&quot;!&quot;) indicate good moves—especially ones which are surprising or involve particular skill. Hence annotators are usually somewhat conservative with the use of this symbol.

(emphasis mine). 2. c4 is the most played move after 1. d4 d5, therefore it doesn't receive an exclamation mark.