It’s tempting to get overly curmudgeonly about these things and shun all modern enhancements and go back to shooting a K-Frame, 870 and a Garand (although you’re certainly not totally unarmed if you choose to do so), but the new hotness will make your life easier if you fit your gear to your requirements and not the other way around.It's a good post and worth the read.
There are the people who hang every possible laser, phaser, and windspeed indicator off their rifle, and then there's the opposite extreme that seems to have taken hold, where light weight is pursued as an absolute virtue in and of itself*, and a lack of accessories, rather than a profusion of ditto, is seen as an indicator of seriousness and ninja-like proficiency.
There's a happy medium between the two, but it requires actually using the weapon to find out what works and what doesn't. And what works is going to be different in different environments: A long gun that is absolutely ideal for an NRA high power match is going to be sub-optimal in a dark hallway, and vice versa. The reason that the saying "the mission drives the gear train" has become such a tired old proverb is because it's absolutely true.
*You know what's really light? No gun at all: You just kill them with Zen mind bullets. ;)