Spend Your Destiny 2 Legendary Shards Now - They're Being Removed Soon

Destiny 2 is deleting Legendary Shards, so spend them before they're gone.
Options to spend shards include enhancement materials from Rahool and items from Xur. However, many purchases are timegated.
You can convert shards to Glimmer at Rahool, though Glimmer is capped. Phantasmal Fragments let you save Glimmer for later.
Raid banners from Hawthorne will likely become free eventually, so may not be the best investment.
Prioritize spending shards on timegated items like Enhancement Prisms and Ascendant Alloys from Rahool before they're gone.

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Relevant topic timeline:

9/15/2023

Destiny 2 Weapon Crafting Exploit Lets Players Create Overpowered Guns

Destiny 2 players are taking advantage of a bug allowing exotic weapon perks to be applied to legendary weapons, resulting in increased damage, although Bungie is aware of the issue and is working on a fix.

9/17/2023

Bungie Temporarily Disables Crafted Weapons in Destiny 2 Due to Exploit Allowing Overpowered Traits

Bungie plans to temporarily disable players from using crafted weapons in Destiny 2 to address an in-game glitch that allows players to equip three exotic weapons at once.

9/18/2023

Bungie Opts for Slow Fix to Destiny 2 Weapon Perk Exploit, Players Embrace Chaos in the Meantime

Destiny 2 players are praising Bungie for allowing the game-breaking crafted weapons bug to continue, giving players the opportunity to revel in the chaos before fixing it.

9/25/2023

Destiny 2 Brought to Its Knees by Ongoing DDoS Attacks Right Before Weekly Reset

Destiny 2 is facing severe DDoS attacks, causing the game to be almost unplayable and resulting in a significant drop in player count, with Bungie struggling to regain control and unsure of when the situation will be resolved.