It seems that WG wants to switch to a new more frequent rebalance in the performance characteristics of vehicles. Thus, the developers want to see a relatively frequent meta-change in the game in 2023-2025.
As the closest example: Dota 2.
“We are considering changing almost ALL tanks in the game. As mentioned earlier, balance changes will occur more frequently.
Super Conqueror is currently probably the best Tier 10 tech tree tank in the game, so its potential nerf shouldn’t surprise anyone”