That's fair enough, if you're just thinking pure bulk "just fill the air with glass powder" that could be pretty intense.

Although if that's all you're going for, I think arrow delivery might not be the most efficient method. Just in terms of man power and supplies to attach each one individually or in small groups to an arrow shaft. I'm almost wondering if something more along the lines of a catapult or trebuchet delivery of a small bundle might be better. Just bind 50-100 drops together and launch that into the mix.

All of this is of course with the caveat that I do think the image of thousands of arrows exploding into glass fragments is ENTIRELY badass, though not entirely practical.

I suspect there are far more effective and practical weapons of a similar explodey-chemically sort. A tiny vial of acid attached to an arrow, phosphorus, sodium in a moist environment, stuff like that.

Prince Rupert's drops are really cool tho. They might be more suited to traps than weaponry. The drop is robust, so it could hold off a spring mechanism, but touch the trip wire attached to the tail, and the drop vaporizes, allowing the spring to trigger the trap.

I like the trap idea, maybe.

Also in response to your manufacturing questions, Teague, I don't know if they could be made with more consistent, less spindly tails. Maybe if they were dropped into a narrow tube of water instead of a bucket.
If this did result in stronger Drops, I'm guessing even ones strong enough to survive the 5 g's would shatter on impact with hard surfaces like shields. If they hit flesh, they might pierce without blowing up....

...only to shatter into a gazillion pieces inside the wound when it hits bone or a surgeon tries to remove it.

Trap idea is definitely a more robust and reliable idea. I wouldn't want to be the guy creating the arrows, nor the one firing them; same goes for packing and firing the trebuchet packs. But the trap idea? I now have something for my next Dungeons and Dragons game I run, thanks.

I don't see this being any more effective than regular arrows. If they're armored such that regular arrows are ineffective, I can't see you getting anything into their eyes. If you shoot enough, maybe you can irritate their lungs some, but I can't see it doing anything meaningful. While it's a cool idea, it doesn't pass the bullshit test for me.