Sure, and I'm one of them. It's not exactly startling news in 2012 that a lot of people prefer the git/hg model. Hell, I prefer it myself! But I've got a complete svn ecosystem set up here, with 44 projects in a single svn repository, automatic offsite backups, and hundreds of checked-out directories spread across five (or more?) computers with five distinct operating systems. As far as I can see, the one-time costs of moving over completely dwarf the relatively small benefits I would gain from using a better branching model.