I don't really like glocks, got my eyes on a Sig P239 Enhanced Elite 9mm, but also kinda like the Berettas for not being a burgerland company, any other brands I should be looking at, whats the least chuddiest company, I looked at the HK site and my god, they have American flags everywhere and MAGA sales.
ETA: Im in 'Commiefornia' so any gun suggestions should be able to be sold here.
Standardization and interoperability is important for armies. When a soldier's gun gets broken it goes to an armorer and the armorer has to figure out what the grunt did to break their gun. If every single gun is the same that's a lot easier to do. It also helps with training, parts, whatever. If everyone trains on the same gun you can just throw a gun at them and they know what to do.
It's not really as much of a thing for individuals. You'll be doing your own repairs or taking it to a gunsmith who isn't under the same constraints as a military armorer. If you decide to go do sketchy militia stuff with your buddies then you should all agree to get ARs that use AR magazines in 5.56 (and maybe standardize what load of 5.56 you're using ie M193 or 885 or whatever).
All that said, I'm a CZ fan too, I just tell people to get a glock bc you really can't fuck up walking in and saying "gimme a glock".