FO3 + NV have massive replayability, especially when combined with mods. People played those games over and over again, role playing totally different characters.
Your gut-feeling about Bethesda games lacking replay value is at odds with objective stats. Skyrim is even still in the top 10 played games today on Steam 5 years after release (and was a stubborn fixture in the top 10 even before the remaster)[1]. Fallout 3 + NV stayed there for years. Admittedly, FO4 dropped out quicker than usual, but a lot of people blame the constricting nature of a voiced protagonist. FO4 is nevertheless still in the top 20 for most players today a year after release.
So their games have definitely got replay value, they really get replay value. Their worlds are full of unique locations. I do admit they got something a bit wrong with FO4, but I think even they must realise that at this point given the player feedback.
To be fair, I'm positive that Skyrim's top 10 spot is due to mods. The modding community has done some crazy impressive stuff, up to and including complete gameplay overhauls.
I wonder if the next Bethesda games will ever see such success after The Witcher 3. That game is so high above Fallout 4, in terms of quests, characters, and anything you could think about, that I seriously doubt Bethesda is capable of producing something that could even be compared.
Your gut-feeling about Bethesda games lacking replay value is at odds with objective stats. Skyrim is even still in the top 10 played games today on Steam 5 years after release (and was a stubborn fixture in the top 10 even before the remaster)[1]. Fallout 3 + NV stayed there for years. Admittedly, FO4 dropped out quicker than usual, but a lot of people blame the constricting nature of a voiced protagonist. FO4 is nevertheless still in the top 20 for most players today a year after release.
So their games have definitely got replay value, they really get replay value. Their worlds are full of unique locations. I do admit they got something a bit wrong with FO4, but I think even they must realise that at this point given the player feedback.
[1] http://store.steampowered.com/stats/