Maybe you don't care about Gerber X2, ODB++ or Diff. Pairs but those are features that are in demand by Commercial Houses that do work on High Speed Circuits and send their work out to large scale PCB Manufacturers.
people that want this stuff, need it yesterday, not tomorrow. if your work requires differential pairs, your already using altium, orcad, zuken. people who need it are not messing around waiting for diptrace who might get around to getting it right one day.
Its great to have more options (especially in hobbyist level pricing!) but if were talking 'Commercial Houses' not hobbyists. If where I worked needed differential pair work for our next control system for the new EPR nuclear reactor + power station going in in China, were not waiting for DipTrace to get it right in a release or two.
Features sell things, Customer Support does not.
diptrace adding odb++, x2, diffpair does not make it prettier to where I work. things that are pretty to where I work are 24x7 support, getting support on site on a sunday if needed, proper server license support like flexnet/flexlm, etc
Customer support sells HEAPS. IBM will drop ship a tech to replace a HD when the big iron phones home. if something goes down in our bigass simulation cluster, HP shows up on a Sunday. If our engineers have an issue with Catia or Solidworks? bam, instant support 24x7. you go into all hands crisis mode on a sunday at 3am and you want dedicated support.
customer support is like the highest thing on the list