It's a relatively simple version control system so it works great for an individual or small team (less than 10 people). But if you have a medium to large team, especially one with members distributed over a large geographic area, or one where individuals need to be able to work "offline" without access to a central server, Apache Subversion will likely not be the best choice.
Also, if you're maintaining an open-source project where outside people will be interacting with your code repository, git is probably a better choice because it's becoming the de-facto standard these days and what most developers are familiar with.
Atom is great for simple HTML coding. It's fast, has intuitive shortcuts and several options. I particularly love the "convert spaces to tabs" function that I haven't seen in other editors.
I'm not sure how it would fair in more serious web development today, if there are plugins for live updates of the page you are working on...
But the problem is that it has been discontinued so you know there are no new features or fixes coming through.
Atom is highly customizable and allows for various themes and extensions that can make your code easier to read.
Atom has many code hinting features that allow users to write faster and integrate with services likeLINT that can clean up your code once your done to meet your internal teams style choices.
It's very fast and manages projects well - Accessing other files within a related folder(s) is very easy and intuitive.
Distributed development - I've never worked in an environment where distributed development (developers widely scattered geographically) was a factor, but that's why git exists.
Merging - Merging of code from one branch to another can be painful, especially if it's not done frequently. (On the other hand, doing merges is one of the reasons I get a nice salary, so I can't complain too much!)
Acceptance - Let's face it, git is what "all the cool kids are using." If you've got a bunch of developers fresh out of school, they'll probably know git and not Subversion.
While there are interesting alternatives, such a GIT, Subversion has been a breath of fresh air compared to its predecessors like CVS or Microsoft Source Safe (now called Team Foundation Server). Its ease of use and high adoption rate is going to keep me using this product for years to come.
Well Atom is open source so the re-new is a no brainer. The only way I would stop using Atom is if the developers somehow made it not function well. Or, if the project got forked to a commercial version or something. Or, there could be the case that development stops or that it was not updated on this or that platform
I give Atom a 9 because it is one of the most modern text editors built with JavaScript intentionally to allow the editor to be changed and modified with custom functionality that a team may need. I think I would otherwise give atom an 8 due to support, but it gets a 9/10 because of the extensibility/plugin capability.
Atom has an active forum and a Slack group where you can ask technical questions. Occasionally, the authors will pop in to answer a few questions here and there, but most of the time, its other helpful users who will assist you. Though they aren't the most knowledgeable, they are at least timely.
As for plugin support, that differs with each plugin, but as I mentioned before, many plugins are no longer maintained.
Git has become the new standard of version control, with its support for distributed design. As a tool to manage and control versions, Subversion does it well, but Git is the future.
Our company likes to keep things open, and we don't want to prevent developers from customizing their environment the way they want. Atom seemed to be a lot more open than our existing tools and has good community support on pretty much any programming language. This can create some confusion since adding too many extensions or customizing can make the tool slower than it is supposed to be.
The tool we use when we need quick fixes. Allows fast, reliable scripting to fix urgent problems in our applications.
When applications grow from 5-10 files to 100's, they need to be migrated to a heavier-duty IDE. This can be cumbersome and quite annoying, but is necessary to maintain code integrity on such a large scale (since it cannot be done with the limited default toolset of Atom).