I would say that they've made a conscious and clear decision to cater to a younger crowd, but that doesn't mean they're throwing us old farts under the bus, at least not entirely.
WotC recognizes that they have a new core demographic, and it is younger than it was at the start of 5E, when the majority of players had been around for awhile, if only since 4E. The vast majority of the new wave of players that have entered the game since 2014 are younger Millenials and Zennials, and thus presumably under 30 years old. They've never played anything but 5E. Chances are that if you're over 30 and play D&D, you've been playing since at least 4E.
That said, I don't see why it is necessary to continually bash older folks, even if they're grumpy at feeling left behind. I mean, it is understandable - they've (we've) invested many years (decades) into this hobby, and are generally attached to this or that element from bygone eras. This is not to say that I don't get irritated when older folks are attached to the past - when I have dinner with my 80-year old father and he waxes on about stuff from the 50s and 60s, or, I occasionally grimace, but I also try to engage him and not invalidate his entire life experience (like my 13-year daughter likes to say to me, "OK, Boomer" - even though I'm Gen X...she doesn't care for the distinction; anyone over about 30 is a "Boomer" to her
).
My point is that older players, grognards and quasi-grognards, have earned the right to have an opinion, even if they (we) are sometimes grumpy about it. Maybe it is old man yelling at the clouds, but there are also jewels of wisdom, or at least interesting takes that differ from the thread of "newer is always better."
Speaking for myself, I'm OK with the shifting landscape, for the most part. I'm not drawn to products like Strixhaven, Witchlight, and Radiant Citadel--for similar reasons that I love Middle-earth and Conan, but not Harry Potter and the endless deluge of young adult focused fantasy on the shelves these days.
But I also realize and accept that D&D isn't just for me - nor does it have to be for me to stay interested, especially considering that A) they still do publish stuff I'm interested, B) I'm interested in D&D history as a whole, and C) There's a larger industry that does produce RPG material more to my tastes, from Kobold Press to Fria Ligan. That doesn't mean I don't have moments where I wish WotC would put out more products that appeal to me, but it isn't personal.
Also, it depends upon how you look at their product release output. In the early years of 5E, I might be interested in 1 or 2 products, but that was out of 3 - so it was one or two-thirds of all products. In recent years, I'm still only interested in 1 or 2 products, but it is out of five or six - so it
seems like there are less products "for me" if I think in terms of percentages, but if I think in terms of quantity, it is about the same as it has always been.
