Do Wired Secondary Boxes have any Dependency on an X1 DVR Box?

I've had it with the refurbished X1 DVR boxes that Comcast keeps handing off to me. Our current X1 DVR box, an XG1v4, has graced us with these two issues:

   i)   a previous customer's scheduled series recordings that has us in whack-a-mole mode as we continually have to unschedule unwanted series as additional series recordings continue to make an appearance throughout the year (... not that unscheduling a series is really such a big deal; but, it's a constant reminder of how little Comcast sometimes seems to care about customer service)

   ii)  the XG1v4, after some hours of not being used, apparently reboots and then ends up stuck at the Xfinity "Welcome" screen. If we want to use it again, we have to power cycle it. We've been in this un-ending loop for months now.

Here's the thing, though: We seldom watch TV in the room with the XG1v4. But we do often watch two TVs in rooms with wired (not wireless) secondary boxes. I'd noticed that when the XG1v4 was stuck at the "Welcome" screen (which was 99% of the time, since we seldom used it), our wired secondary boxes seemed to continue to work fine. To determine whether the secondary boxes would continue to provide all functionality (live TV, ability to record & access to all our recordings, access to On Demand programming) with the XG1v4 powered off--rather than just stuck at the "Welcome" screen--I powered off the XG1v4 box about a week ago. And the secondary boxes continue to soldier on, with no apparent interest in or dependency on the X1 DVR box.

So, can I package up the XG1v4, drop it off at the local Xfinity Store, and have it removed from my account? Or, will removal of the X1 DVR box from my account have an impact on my secondary boxes that merely powering off the XG1v4 didn't? In addition, are "all" of our recordings cloud-based? That seems to be the case, since we continue to have access to all of our recordings with the XG1v4 powered off. But, could removal of the XG1v4 from our account have some impact on the recordings we currently have access to?

btw: I want to keep the secondary boxes, rather than relying on the Xfinity Stream app at our secondary box locations. I actually think the Xfinity Stream app is pretty decent on iOS devices. But trying to use it on an Amazon Fire Cube in place of our secondary boxes comes up way short. With the Xfinity Stream app on our Amazon Fire devices: Fast forward & rewind is non-existent on Live TV; fast forward & rewind on recordings is much inferior relative to secondary box fast forward & rewind; slow motion functionality is non-existent on the Xfinity Stream app; lastly, our Amazon Fire Cubes, like our Xfinity secondary boxes, are wired at LAN locations in our home that provide better than 600 Mbs download speeds. We rarely (if ever) see buffering from any streaming app on the Cube other than the Xfinity Stream app, which tends to buffer several times every 10 minutes or so.