There were multiple versions of the previous codec packs, supporting more file formats as time went on. Again, the whole RAW format support is just peddling old features as new, under the bonnet of Windows 10, as though regaining lost functionality is something to be excited about.
If folks can't otherwise use their RAW formatted files already, they have bigger issues than whether Windows 10 natively supports them in a few of it's built in utilities.
Frankly, Windows support can fall off the planet for all I care. I don't have any systems running 7, but do support plenty of folks still using it, and the software will continue to do it's job well into the future unless forcibly hobbled. Just because Windows 10 is gaining market share doesn't mean it's user base is a willing one, rather than one that has been coerced due to market restrictions. A lot of "normal" people aren't even aware they are running Windows 10 on their machines.
Who's obsessing? Windows 10 was a step backward in core OS functionality and user agency, not a step forward, and my personal opinion of the UI is that it's an inconsistent dumpster fire. As a long time Windows user, I shouldn't need to use the search function in the settings on a regular basis to find what should be readily accessible settings. Removing the volume mixer link from the left-click menu is another idiotic change for change's sake. Functional changes like this, without any sort of logically rational basis, is at the very least frustrating for those who use them.