I read years ago something wise someone wrote - that it doesn't matter what the gear is if you don't practice with it and become proficient.
I have used this example before from my own life in the corporate world. About 20 years ago, I used to organize corporate golf tournaments. Many guys (and it was mostly male dominated) would show up with their brand new Ping, Titleist and other clubs they spent $4000+ on the set (not including the driver and irons), and even though the tournament was scramble/best ball style, it was always interesting to see how these corporate sales guys would step up to the tee, brag how they just cracked open a sleeve of V1x Pro balls ($9 a ball) and then quickly proceeded to slice it into the woods.
Meanwhile there was a middle aged lady (she's gotta be a grandma by now) who had this set of wooden MacGregor CT or Woolco clubs and she only had 3i, 7i, 9i, putter and 3 wood, and carried them in this shiny red vinyl old golf bag that looked like a punching bag was from Rocky II.
She beat all of us every time, every year. It was a blessing if one ended up on her team any one year.
I see the same dynamic with firearms. Lots of people on YouTube will show their swank zombie gun, all decked out and stuff and start talking about their prep plan and stuff, but sometimes that is all it is - just talk. Meanwhile, someone with an old 10/22 who has been practising/training with it for years, going weekly to their range and practising multiple facets of target shooting discipline - with their experience, skills and their 10/22, they would probably fare better than the person who has the latest all souped up firearm with all sorts of tactical attachments, but they seldom go to to the range to practice - and some may not even have a range membership or access to crown land.
I know a fella that has a pretty cool end-times set up for his rifle, and he told me a number of years ago he stocked up on that novelty stuff...what was it called - Zombie Max or something from Hornady. He was telling when chaos descends and there is rioting everywhere he will be ready. I asked him whether he has tried the Zombie Max rounds in his gun. He said no. I said well, how do you know it feeds and ejects ok (much less whether he can achieve accuracy on it). He said the Youtube videos are favourable for reviews and besides that stuff is expensive and he doesn't want to waste it.
I am not even convinced he has even shot the rifle that is his end of the world gun (I don't even know what it is). Apparently he has 30+ magazines for it. But hey it has a tactical flashlight, a laser, an Aimpoint optic and a magnifier.
I'd rather just keep a basic 10/22, with an assortment of ammo to try to see what works and what doesn't and stock it accordingly, with regular practice/training for the same. Or carry multiple guns for different utility purposes. It's nice to have a one size fits all rifle, but some situations may call for different tools.