OwnCloud is open source and does the same things as Dropbox (although in really crappy PHP on the server, so you'd better have a lot of spare cycles to burn - it's the first time for several years I've seen file transfers across the Internet be CPU limited).
The problem is that they're comparing apples to oranges. Of course a direct local connection will be faster than two devices sharing the same Internet connection and going via a server, but most of the time that I want to use a server as part of a sync workflow it's because the devices aren't together and I want to do it asynchronously. The equivalent for BitTorrent Sync would involve having a central server somewhere (possibly in your own home) that's always on and is a party in the sync.
Microsoft poisoned them killing the company
Bullshit. Nokia mismanaged itself to death by promoting infighting and sabotaging other product groups (rather than competing with other companies) until adopting Windows Phone and killing internal OS development was the least bad option.
My ability to put 'latex manuscript.tex' and 'dvi2pdf manuscript.dvi' into a makefile is not magic, it is basic automation
It's also redundant and likely not to do the right thing (ironic, given previous comments about libraries). Look for latexmk, which is part of the standard LeXLive distribution. Oh, and since this is not 1970 anymore, let's skip the DVI step and go straight to PDF with pdflatex (latexmk -pdf manuscript.tex is probably what you actually want).