zeroscan

I've never tried Bedrock myself, but was intrigued enough when I learned about it to read up. (So take my words with a huge grain of salt.) I believe that you have it right in your first point: you can run a kernel and drivers from, say, Debian stable while running cutting-edge rolling release userland applications from, say, Arch. And if you want a few slower-moving applications you can get those from, say, Ubuntu while still running the rest of your system as Debian and Arch. And if you need something really obscure that you can only find in a weird Gentoo overlay...

As to your second point, yeah, you can go with SystemD from wherever or OpenRC from Gentoo or Runit from Void or whatever else you want.

But really, I suggest you try out Bedrock in a VM and find out for yourself. If it works like you want it to, then go to town on your bare-metal install (after backing it up first, of course!).

Mixxx is the only Linux-native DJ software that I know of, but it's still amazing. If it's missing featutes compared with Serato or Recordbox I'm not good enough to miss them yet, and the features it doea have are damn impressive.

Likewise, Inkscape and Gimp are both great. I know that Gimp takes a lot of heat for not being as "good" as Photoshop, but it's just different. The few times I've tried Photoshop were as painful to me as Gimp seems to be for others. And since I don't need the CMYK functionality that Gimp is missing, I'm happy with Gimp.

LaTeX has a steep learning curve, but using anything else for documents is like stone knives and bearskins in comparison.

First off, I take issue with the idea that hobbies are pointless. If doing something makes you happy, that's worth a lot in my book: whether that hobby is playing golf or collecting stamps or using a non-mainstream distro.

To the point: for me, Gentoo has a purpose in that it's the easiest distro for me to maintain. Yeah, I had to negotiate the learning curve, but now that I have I know how to keep my install running and fix things when they break. Before my last computer died I was running the same install for 9 years straight, and my current install on my "new" computer is five years old. I never got that feeling of "system mastery" with Ubuntu or Fedora.

So there's your purpose: it works better for some people than other distros. Everybody has their own preferences and values, and Gentoo matches those for some. It may not be your cup of tea, but that doesn't mean that everybody should just use what you consider to be a "useful" distro.