Red Castle
Adventurer
I believe they do. I believe they still care about the older players. Asking the opinion of the community via polls shows a will to listen to the current player base. Not changing for a new edition by making the future changes compatible is another way to try to keep the older players. You can be against their changes, doesn't mean that WotC doesn't care about the older players, at least what they believe is the majority.That would be a great plan. I really wish WotC was following it.
A game, be it a TTRPG or Wargame, always evolve. If it didn't we would still be playing the very first edition of DnD and Warhammer 40k would not be going to its 10th edition. Every time there is a change in edition, a game will lose some players, sometimes more than other, but the idea is always to win more than you lose. Now, when your game have millions and millions of players worldwide, you can't please everyone, it's impossible. But if the new editions didn't also have the older players in mind, they would have just died or went obscure, you can't rely entirely on a particular age group of player. But since the company can't realistically please everyone, it's natural that every time a game evolve, some players will feel left out. There is a reason why even though there is 5 edition of DnD, there's still players playing older editions. You also have to face the reality that some players just won't move to a new edition because they have been buying hundreds of dollars of book, they don't want to 'lose' their investment and start again.
So by making OneDnD still compatible with 5th edition, being an evolution of the game and not starting at zero, I believe it shows that they do care about the older players, or they would just scrap all that and move on to 6th edition, like they did with 3rd, 4th and 5th in the past. And yet, everytime they moved on from a past edition, there was always players that didn't want to make the switch, but still the playerbase continue to grew. Even the 4th edition that is considered by a part of the community as a failure in fact sold really well, just not as much as WotC expected.
So, even though the game is moving in a direction you personally don't like, doesn't mean that WotC doesn't care about the older players. You might not just be in the majority. And it's okay, a game can evolve without you. I mean, 4th edition is my personal favorite, doesn't mean that they were not thinking about older players when they switched to 5th edition, even though I've been playing since the late 80s. And judging by the success of 5th edition, I believe they made the right call.
So, unless you think that a game should never evolve and get stuck in time, I do believe that they currently have both the older and new players in mind and really try to please both.