I wouldn't buy a firewall...
... I'll build my own from FOSS. I got skills, baby.
Snooty snobbery aside, if you have to drown your shop in (E)TLA soup to keep it going, you're doing something wrong. Yes, prefab models and methodologies are all the rage these days, but they're like cookie cutters. Useful if you need lots of cookies cut, not so useful if you're a chef and would be far better served with a nice and sharp knife.
Seens to me most enterprise IT is full of cookie cutter users, or at least so would the confident salesmen have you believe, so lusts the pointy hair and so hire the HR drones. Might be at least some of them would be better served with a chef instead.
Personally, I dislike frameworks with a passion. And that's in this as much as in software. There, and I have little reason to believe this'll be different, they're excuses to set up grand schemes full of scaffolding and allusions to universality and such, then fill it in with "useful" code that does things that make sense within the model, but much of that code often enough sees little use and not terribly much debugging. Possibly the warm buzzy feeling of working within a framework is to make up for the overall poor experience and performance, bang per complexity, and so on. In the process field, I need only say "six sigma" and make basically the same point. Mixing and matching smaller "frameworks" to get the same thing is, well, a different approach, I'll give you that. But that doesn't automatically make the whole thing a good idea.
Don't get me wrong: There's nothing inherently faulty about the idea of modelling and framing what you do. It just isn't automatically a good idea to go out and fetch yourself a couple then throw them in the organisation. Modelling is a tool to help you think.
What's happening here, however, is that a few bunches of people thought up a lot of stuff, possibly as a result of years in the field and so on, and are now selling the resulting thick books, reports, consulting services, and so on, and so forth, and are making a pretty penny out of the resulting cookie cutter selling business. And that's fine, of course, it's a free economy. But ask yourself: Does your business really need more cookie cutters?