As far as I can see, the meat of your argument is 'outdated packages, poor documentation to solve problems', but in those terms Elementary is almost identical t

As far as I can see, the meat of your argument is 'outdated packages, poor documentation to solve problems', but in those terms Elementary is almost identical to Ubuntu LTS. In fact, under the hood, Elementary is essentially an Ubuntu LTS flavour with their own default apps, running a customized toolkit. For any problem not related to those apps, or the desktop environment, you look up information for the associated Ubuntu release. I imagine in that sense it's very similar to any of the flavours, which you are suggesting as a better alternative. For some developers LTS is no good, because they need the latest packages, for others it's not an issue. That's a fine point to make, but I don't see how you get from that to 'Elementary is no good for developers'.