'Other LMS have a unique format and all the courses must use it. No options to select a different.'
Yes, one of the things I love about Moodle is the flexibility it gives staff to select the appropriate way to display their content. For some that is Grids, for others Tabs, Topics (with scrolling or with one per page), Weekly, or even the flexsections format or any one of the others. If an institution wants to lock the options down to a single course format for consistency they can, but, the power and flexibility of Moodle means that doesn't have to be one of the core ones, it could be Grid, or Collapsed Topic for example.
Right now I'm working with a commercial LMS and the page layout is horrendous and the structure is limited to everyone having to use folders and folders inside folders and folders inside fo.... you get the idea
Now that structure can be appropriate in some instances (when it is used properly), but when its forced on an Art course who are used to the grid format in Moodle and having their art work as the topic images, or it's forced on a course that have previously used a Book structure of resources in Moodle, or tabs to simplify navigation, etc. and now have to navigate through a set course format with no flexibility to structure their course the way they want to teach ...
Wasn't there a discussion recently about restructuring the way the dependencies work in version.php of plugins? Could this suggestion be built in as part of that discussion - I did look quickly but can't find it right now (I'm already running late and supposed to be on the road by now ) but will look later if no-one has located it by then
I think it makes sense - it may, at the moment, have limited applicability, but as Fernando says, with the way plugins interact with themes, and especially course formats, these interactions are becoming more and more important and having a way to determine what version of those plugins is required, IF they are installed, but not making them an actual requirement for installations seems like a very useful idea to me.