1.17 interesting notes

[Azdin]

I found these things interesting

Beacon beams are now visible up to 1343 blocks away from the source instead of 256 blocks.

Changed one pixel on the pumpkin's top texture to remove the possibility for a small swastika to be displayed.

Rails No longer break when contacted by water.

And of course

If a shulker is hit by another shulker's projectile, it now has a chance of spawning a new shulker. Shulkers are more likely to spawn new shulkers when there are fewer shulkers nearby.

[MoWobbler]

Another interesting thing is that you can use leads on squid now

[Azdin]

Another one. Performance issue with drowned just like we used to have with pilligers. https://bugs.mojang.com/browse/MC-202246