If you watched Pokemon as a kid, you should watch the last 11 episode arc. The entire thing is basically just a huge love letter to those early seasons.
Why now? Why did they end the anime now?
To clarify: The anime will continue, but Ash and Pikachu are done as the main protags.
Wait, now I’m even more confused. Why did they wait 26 years to change protagonists?
Nope, just today. You might be thinking of 1 or 2 of the more recent AU movies starring Red rather than Ash.