Pierre and Megan, you’ve been trolling these comments for two full years, now. I can see, after carefully reading all of the commentary and the thought behind each of them, that you both are only here to troll and discourage. Neither of you have offered any real concrete proof of anything, and you’ve used smoke and mirrors to try to defend merely what are empty opinions. After two full years of trolling this particular page it’s about time you both got told to get a life.
The easiest answer is perhaps the lack of commercial applications for desktop Linux, even for a popular distribution like Ubuntu. There is no shortage of quality desktop apps like LibreOffice, Firefox, GIMP and VLC – even Minecraft runs perfectly well with OpenJDK Java – but when it comes to multimedia creation, Linux desktop distributions still left behind. With no Photoshop, After Effects, Ableton Live, or Premiere Pro for Linux, we have to turn to alternatives. For image editing, GIMP and Inkscape have Linux pretty well covered, while Bitwig and Ardour meet most Linux audio editing needs. Thus, here follows my review of a few readily available Linux video editing software (I tested them on an up-to-date Ubuntu 18.04 LTS 64-bit system.) This list is not in order from best to worse or vice-verca. As I completed the test for one Linux video editing software, I wrote it down and ranked it based on my experiences.
Cinelerra *had* the most promise and it’s probably good if you want to run a TV station. However, it’s not creative at all. Simple edits are easy. However, anything else can become a stunt. IMO, Kdenlive has seen the quickest growth. Lives is also doing well. In the next few years we may see those apps grow into the free alternative of Finalcut – but not Cinelerra. It does what it does, and there is no need to change.
The Cinelerra entry needs updating. Not only does the provided install link not work, the separate branch GG Infinity supports 8 Linux distros and provides instructions to auto-update every month (see https://www.cinelerra-gg.org/downloads/). If the different branches are confusing, visit https://en.wikipedia.org/wiki/Cinelerra which will clarify it.