I mean, he is right... NV is about on par with F4 in terms of memorable locations are concerned.
Everything is up to personal tastes, of course, but NV has more memorable locations(meme one-note places like "Republic of Dave" or literal meme vault filled with Garys don't count) and the game actually has you going to them for the main quest unlike Fallout 3. Oasis? Most people will miss it, Old Olney? Probably the same unless you have the DLC, and even then it's just a Deathclaw dungeon without the DLC. That's really my point, Fallout 3 is empty and has nothing going for it, not with world building and not with anything that actually engages with the story or characters. The locations might make for fun combat arenas, but that's about it, and as I said combat in Fallout 3 is garbage so that's a moot point. Most of the map locations are either isolated spots with some raiders or minute bit of loot(kind of like Starfield, I guess these games haven't changed too much), tunnels filled with ghouls and minor loot or DC ruins filled with super mutants and some loot, occasionally some random trader that has nothing good for sale too. The only way this is appealing world/level building is if you were a child and this sort of simple amateur hour content actually impresses you, hence my comment.
Meanwhile, Nellis AFB, a location every character has to visit in New Vegas, blows anything in Fallout 3 out of the water with the locale, the writing, the worldbuilding, speech checks and the questline. Raising the bomber out of the lake at the end is quite literally more memorable than anything in Fallout 3, that includes the main quest, side quests and DLC, not to mention it has an actual reactive element at the end when getting the bomber pays off and it bombs the shit out of everybody during the battle at Hoover Dam. I don't even think I need to go that far, the very first act of the game(Goodsprings, NCRCF, Primm, Mojave Outpost, Nipton and surrounding smaller areas) have more thought out worldbuilding, more engaging content, better writing, better encounters, better quests and better interactability than anything in Fallout 3, let alone the entire rest of the game. One-off quests or locations don't matter, especially if they don't impact the world in anyway(You let the ghouls kill the residents in Tenpenny Tower, what changes aside from a single radio broadcast? You made a choice regarding Harold in Oasis, how does that effect the world? Oh wait, it doesn't, except for a single radio broadcast and what loot you get).
Fallout 4, on the other hand, has no locations since Todd in his infinite wisdom decided that players will make their own via the settlement system. It took DLC to add actual good hand crafted content like Far Harbor and Nuka World, meanwhile DLC content in New Vegas is commonly seen as not only the best content in the game but also some of the best DLC in gaming, period(at least for the time).
If you disagree(and you're therefore wrong), feel free to write about it in the Fallout thread, I feel this is close to derailing the thread. Ironically enough, TES is better in the worldbuilding department since it's a fantasy game where the creators can just make up whatever the hell they feel like without following established precedents, lore or compete with other games in the franchise not made by them. Gee, it's almost as if Bethesda's Fallout really is designed like Oblivion/Skyrim with guns, with all that statement actually entails.
