For a new player, this will only break the immersion and spoil the 'story' of the various great storylines found throughout the game. Veteran players may want to level fast but still, revisit old places to re-experience the game through fresh eyes. How is a player to level quickly without breaking the immersion of the game? Level smart. There are ways to quickly level that apply to any area of the game.
Special note: At 110 it's almost certainly worthwhile to go and immediately get your Heart of Azeroth and first piece of Azerite gear from the BfA opening quest. It doesn't take long and provides pretty high power levels. I'd then return to Legion quests until 111 or even 112, since the power of these items will increase your kill speed significantly over the scaled enemies of BfA content.
Even though the value of gold relative to real money plunged during the Legion expansion, we didn’t see corresponding increases in auction house commodity prices, with the exceptions of big-ticket vanity items like TCG mounts. Consumable prices in gold were actually stable or falling during the same period that the value of gold relative to the dollar was plunging by more than 80 percent.
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