That's what I mean. For new DMs, there's better written advice on how to run and prep an adventure out there (IMO). For new and experienced DMs, the
SRD has most of the items and rules you might need to reference (in an easier to reference format). For experienced DMs, even if they are new to 5e, it's not clear if there are enough subsystems and optional rules to make it worth purchasing it. That's kinda what I was wondering in the other thread: what would the revised 2024 dmg have to provide in order for you to purchase it? I know it's tradition, but does the game even need a separate ($50) volume for dungeon masters?