WoW does experiment more - and those experiments led to the player base dropping to 10% of what it had been at the game's pinnacle. That's a double-edged sword and Blizzard ended up cutting itself far too many times. It shouldn't be surprising that some other games prefer to stick to a formula that worked for them.
Dragonflight has been getting some great feedback at least. Good for Blizzard after a couple of major expansion failures.
But I don't feel like FFXIV is in maintenance mode either. YoshiP has brought up some of the problems the game has after a decade and hinted at changes that will be coming in 7.0 and beyond. The 6.x series very much is downtime in preparation for the transition and we were warned in advance what to expect. We'll have to wait for 7.0 to see if they nail the changes needed, or if it will truly end up with the downward spiral that WoW went through after its first 6 years.
For now I'm still very happy here and haven't heard enough out of Dragonflight to tempt me to go back to WoW (especially when members of my Marilith FC quit Dragonflight after 6-8 weeks mainly because of community toxicity but also because they started feeling bored after reaching max level). It could very much be a matter of personal preference. Some enjoy WoW more, some enjoy FFXIV more. That's not only perfectly fine, it's healthy for the gaming industry in general.
I'm not mad at all. Different players like different things.
But I do like specifics. I do like to see counter examples of where other games have or are doing things better. Go into the Housing subforum where I talk about the problems with the FFXIV housing system and you'll frequently see me bring up RIFT Dimensions. I know housing in this game can be better because RIFT was doing it better almost a decade ago.
And I really dislike the same players flooding the forum with the same complaints over and over and over again but not doing anything to improve their situation. As someone else said earlier, it genuinely is not healthy to get stuck in that negative mind set.
If you cannot also find something positive to say about the current state of a game you're playing, you are better off finding a different game to play instead of paying just for the sake of forum access so you can continue to deepdive into the negativity.
I got to that point in WoW myself back at the end of Legion. So as I was making the break once and for all from the game, I set up parental controls and turned off the ability to post in the WoW forums. That made it much easier to walk away from a game that had changed so much I could no longer enjoy it.
But it is true that shaking up a game's formula will alienate long time players. If all long time players want change, then WoW wouldn't have dropped from 12 million subscribers at its height in Wrath down to 1-2 million subscribers in Shadowlands. Nor could the game attract enough new players with those changes to offset the losses of the long time players.
If I'm bored with what one of my current games offers and want something new, I go looking for a new game. That makes far more sense than expecting my current game to change.