This is user dependent. I LOVE my 2520. YMMV.
Windows RT devices will not upgrade to 10, but there is an update that makes the UX very similar. I've been enjoying the new "look" since September and the experience puts my tablet in-line with my laptop so I'm not schizophrenic when I switch between the two. Here are the details in case you missed them. How to use the Windows RT 8.1 Start menu | Windows Central
Contrary to what users on the forums always trumpet, "RT is dead;" the fact remains that Microsoft will support RT 8.1 until January 10, 2023. https://support.microsoft.com/en-us...=0&esdate=0&medate=0&spdate=0&Filter=FilterNO
You still get hotfixes, security patches and updated virus definitions for Windows Defender. Your version of Office 2013 continues to enjoy official support as well. I'm regularly receiving updates still.
While the device will probably not see added functionality and App access, there is no reason to fear there will be any decrease except perhaps in terms of 3rd party Apps no longer seeing updates.
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