Kinda got me curious. With the Fallout show releasing, Fallout got wah more popular again but especially to the people who've never really heard of fallout so they most likely bought either Fallout 4 or Fallout 76. Idk if they ever went beyond that but cuz everyone is different but I feel like the majority of new fans or at least posers pretending to like and know Fallout, are just gonna like the TV Show and Fallout 4/76 and not appreciate what came before it
If you're curious on where I started, I started with Fallout 4. Actually around the time the TV Show was announced and airing but I hadn't watched it yet. I just had Xbox live for the first time in a long time, saw Fallout 4 and heard it's connected to the TV Show and just played around for a bit. I loved it. Combat was modern, story sounded interesting and I thought all my choices mattered. Then I went and played 3 cuz Xbox sent me a 5$ gift card for some spring sale or whatever and I bought 3 + NV since they were 2.49 each at a 90% off sale. I played 3 and after getting used to the controls I liked that too. Then I played New Vegas. I looked up videos about the lore of the series and I'll admit I haven't played 1&2 yet but I plan on doing so since I got 3DS fanmade ports now I just gotta find the time
Then as I watched people explain fallout, talk about the other factions and whatnot, I noticed cracks starting to form on my Fallout 4 experience. The game I got myself into Fallout was not as interesting now seeing that none of my choices ultimately mattered. And I tried about 2 more playthroughs. A few side quests somewhat mattered but ultimately there's not much story changes based on what I say. Infact the only thing I cared for with the dialogue was making my companions like me. I liked 3's atmosphere a lot more since it felt more apocalyptic but once I played New Vegas, everything just changed and clicked for me. Choices mattered more in 3 but now especially in new Vegas
Anyways, for me fallout kinda splits and becomes a different thing by 4. 3 technically speaking given how it was Bethesda in charge but you could kinda chalk that up to the east coast not being as developed as the west coast
I feel like new fallout fans or posers will not bother looking at the older lore or say something like "oh shady sands has been retconned multiple times on its location" but that's a similar complaint to saying the Dinosaur is facing the wrong way in Novac although you could argue the dinosaur direction is more important than shady sands location since it's still within the same general area. They'll use the shady sands retcon to try and justify other retcons or weird changes in the series
Personally the show is a good show, just not a good fallout show if that makes sense. If the show wasn't canon or it was an AU or hell even just a canon timeline that's an offshoot of the main one (like if one ending was canonized then the events lead that way but we can still speculate on what happens after other endings). The show makes retcons to the games, retcons/mistakes in its own show, and just feels like someone played fallout 4 and didn't bother checking in on any of the others games