Unfortunately, "several" means they pump out so many phones a year... it doesn't mean Galaxy S flagships more than a couple years old are getting the update.
That's one thing that's always fucked me off about Android. The hardware is capable, but after a year or two of updates, they just cut you off, expecting you to buy another one. And that's fine if, for all the data collection and for how far behind iPhones they are in terms of performance (sorry, I know that's a sore spot among Android enthusiasts... but the numbers do not lie), you were paying much less for them. But for iPhone prices, if you can't expect iPhone performance, you should be able to expect a longer period of support. They say they offer 6 or 7 years of updates, but they aren't going that far back. My own Samsung phone is a Galaxy S10 from 2019, or 7 years ago. Let's see it get the update. But they won't do it. They could โ the phone is certainly capable enough โ we've all (iPhone users included, and perhaps especially) been sold on this lie that you need the newest phone every year. It's horse shit. The S10 is still a capable phone, and I imagine its iPhone contemporary is, too. (And I imagine that iPhone is still being updated, as it should be.) But they won't, because they just want you to keep buying them.
Android users deserve better.
At least the value depreciates faster than iPhones, so you can get a gently used one from a year or two prior for a whole lot less than an iPhone from the same year. Like for example a Galaxy S24 vs an iPhone 15. Or an S23 vs an iPhone 14 (except then you don't get USB-C, so I wouldn't recommend it, the hassle of getting Lightning cables has to be factored in).