I see that many are perplexed and give examples of some completely absurd systems of seasonal updates, but it seems to me that everything is much simpler.
1. Yes, there will be no more chapters, but we will simply receive less content, but more often (during one season), so by the end of the year, it seems to me, we will still receive the same amount of content. It's just that now the content will be smoothly distributed throughout the year, and not released all at once.
2. What will happen at the end of the season? As has already been said, the content will not go anywhere. It seems to me that it will work the same way as with chapters. First, you buy a season for money, and when it ends (everything that was planned in it was released), it leaves the store for real money and goes to the crown store, where it can already be bought in full for crowns for those who did not buy the season at the beginning, or not buy at all if you have eso+.
3. Complication of ordinary locations. Many people don't like this, but many players have been asking for this for at least 5 years. I don't think they'll make it unbearably difficult, I hope they'll rather add more hp and damage to special attacks of enemies that can be avoided/interrupted (not talking about bosses), as well as increase the damage of traps and give them a debuff with disabling regeneration for 10 seconds.
4. Free updates. Yes, they were before. But never such a global one. Reworking locations is very good. But I would also like to know if we will get free new quests in these zones?
That's all I wanted to discuss, but I don't mind discussing it with you too.