system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Is there any practical reason to not carry a double bladed lightsaber? Two lightsabers? Two lightsabers that connect to form a double bladed lightsaber?

Understandably for many Jedi the lightsaber is not an everyday tool, it's a badge of the office and perhaps a traditional weapon more than anything; but like modern day cops they hopefully don't actually have to use the thing that often in combat so one single bladed lightsaber is probably fine? However for Jedi in the midst of a war like say the Clone Wars or for the Sith who prioritize combat readiness much more than the Jedi do is there any reason to favor one single lightsaber? Even if you're most comfortable using one lightsaber why not at least give yourself the option? One lightsaber can be kept on a belt (securely if need be in case of force pickpocketing) and double bladed lightsabers can be configured to ignite only one end at a time giving you the option to switch. So why isn't that more common than the nearly ubiquitous single blade that every Jedi and Sith in the galaxy seems to favor with a handful of exceptions?
gpt
Most Jedi at the beginning of the Clone Wars were generally trained to make use of one blade because one blade is enough for ninety-nine percent of the situations a Jedi was expected to find themselves in, and this didn't change once the war broke out.

A lightsaber's such a superweapon that extra blades and weird hilts are only really an advantage when you expect to fight other lightsaber wielders, a situation that wasn't really common enough to push most Jedi into learning to use them, even during the war. Look at the weird lightsaber users from the movies - Maul's dual saber, Dooku's fencing saber,* Kylo's crossguard saber. The Sith use these because unlike the Jedi, they expect to fight Jedi that'll be caught off guard by their fighting style.

\* Dooku's not a great example because he learned saber fencing as a hobby when he was a Jedi, and coincidentally turned that hobby to deadly purpose as a dark lord of the Sith.