I, for one, avoided buying one when they were first offered.
The entire point of the bullpup is to have a longer barrel in a short package. That's because at the time when they were first considered viable, ammunition and powder technology offered no other solution. It was carry a 20" barrel and get speeds over 3,000 fps, or do without.
These days, that's available from the 6.8SPC in tactical loads from a 16" barrel
The action being set further back means dropping a magazine that's trapped under the elbow, and then inserting one by reaching under the stock with the off hand exerting upward pressure, all while not being able to see. That is, if you still need to continue to track the target - which in combat is preferred. Otherwise, you not only break cheek weld to reload, you have to pull the stock off the shoulder to watch what you do. New soldiers are slower and acquire targets less rapidly doing that. Experienced soldiers can do it with whatever weapon they prefer - but we don't keep an Army of trained 35 year old national level competitors. The average soldier in combat arms is less than twenty four, and marksmanship still isn't the primary task they get promoted, trained, or even a dime in incentive pay. The APFT gets more attention.
Since the barrel is so short in front, there is a requirement for an optical sight, which is preferred. One million Aimpoints have been issued - and when they break, having one integrated on the first AUG's meant the weapon was down. No BUIS.
The short barrel also means the support hand must be restrained from getting in front of the muzzle. It's no wonder they were equipped with VFG's, but that still doesn't shield the hand from a hot barrel. Neither does the typical M4, note the quadrails are now much longer, and competition shooters reaching forward to control the muzzle for more accurate shooting. It's debatable the short bullpup is any better in that regard. It can't be shot that way at all. we'll never know.
As for the rare kaboom, the typical issue is a popped primer, so gas is vented where the designer makes it go as best they can. With a separated case head during extraction, which can release 50,000 pounds of pressure in the receiver, it's been noted AR's will split the upper, eject the magazine in pieces, and release gas in jets that will cut and burn. That all happens in close proximity to the neck with a bullpup. Some of it can be engineered, but being largely ambidextrous, it limits what can be done, too. Not only the direct affect of the receiver impacting the side of the jaw, but the magazine being propelled against the ribs is possible. A lot of that work may have been done and is why we see bullpups weighing a pound more.
One thing very much overlooked is using the rifle as a weapon itself, with our without bayonet. The principle in combat is to have more reach than the enemy, in riot control or CQB, a shorter weapon has less advantage. Bullpups don't excel when opposed in physical drlll.
Designing the length out of it may offer the advantage of shortness, but it's a disadvantage in other respects. With the bullpup, it's all you get - the action is now in the stock. It can't and won't get shorter. With both hands in front of the center of balance, it's butt heavy. The center of balance is behind the grip. The stock naturally slips out of the shoulder pocket and the muzzle goes in the air. It isn't handling better, just different. In recoil, having the hand under the barrel isn't any different than the AR, to tame the upward impulse, a muzzle brake should be fitted - which still doesn't fix the rearward weight bias.
Let's add the Chinese to the bullpup user group. They are fielding the third generation to first line troops, it's been out since 1995. The QBZ is a Stoner AR 18 short stroke gas piston designed to make a cheaper action for third world nations. Nothing special and imported to Canada. I would like it to be sold here, it would certainly be as good as Century AK's for providing an example of why the concept isn't optimum.
If anything, having Steyr make the AUG is why it ran so well. A Noveske or BCM AR is, too. You get what you pay for - would this conversation be as positive with $350 QBZ import bullpups in the mix, too?