LivCi

1. The bowtorns do not retreat immediately.  This mod adds a retreat behaviour governed by what is called an "execution chance", which means that for every game tick the bowtorn is in sunlight there is a chance that it will choose to retreat.  Surface bowtorns have the highest chance of retreating but the "deeper" the bowtorn the lower the chance.  This means that it may take a while for them to decide to retreat, especially the stronger ones. It may take 2 or more in-game hours after a temporal storm for all bowtorns to finally decide to leave.
2. Bowtorns will only despawn if they can spend at least 30 seconds at more than 32 blocks distant from the player (or 3 seconds at more than 64 blocks distant). If, due to hills or chasms, the geography of your location prevents them from reaching that distance then they will never despawn.
3. The way the game works, some bowtorns (and drifters and shivers) that spawn during a temporal storm aren't actually spawned by the storm but are instead spawned by active rifts near the player.  Bowtorns spawned by those rifts will be the vanilla variant that never retreats.  The upshot of this is there may still be some vanilla bowtorns lingering after a storm even with this mod active.

There are story locations -- cough devastation cough -- in the game that require bowtorns that do not flee in daylight, so I cannot wholesale replace all the bowtorns in the game with my variant without negatively affecting later stage gameplay.

If, despite the above, you still think this mod isn't working, please contact me so I can look into it in more depth.

For me, even the bowtorns that this mod adds don't retreat

Streetwind

Yes, this mod is still relevant (as of 1.20.10), as the vanilla bowtorns still lack an AI task that would cause them to retreat in daylight.

RowanSkie

Yes, the mod duplicates most of the bowtorns.  The duplicates are the "bashful" ones. The last "n" in bowtorn in the entity description is actually a "fancy" font so you can tell the difference if you look very closely.

This duplication is because the bashful ones only spawn during temporal storms; the regular vanilla bowtorns (which do not retreat in daylight) still spawn from rifts and at any story locations, so the game needs to have two different types.

Is this mod still relevant as of 1.20.8? There seems to have been work done on Bowtorn spawning in particular, according to the changelog, and the "Fearless Foes" patch was already incorporated back in 1.20.5.

This mod duplicates every bowtorn save for gearfoot bowtorn in the creative menu?

crumps Let me know how it works. I don't use that mod myself but I'm happy to try adding compatibility for it if required.

Much appreciated on this. Going to test it out as well with Wilderlands Rustbound to see if it will despawn their spawns after the storm. Its a small thing, but they're def supposed to despawn/run away after the storm break and its daylight.