Nothing in that second quote block is in the post you're referencing nor any other. Are you trying to make it look like you came to this conclusion weeks ago?
The Microsoft spokeperson states the reason in that same sentence:
The Microsoft reason is bull****. They have a DVR in final testing so how much more time/work to release it? E Guides and server are the only parts I can see that may not have been in place. That I think is another revenue stream feature that will be provided across the Windows 10 ecosystem so it makes no sense.
Paul Thurrott mentioned the DVR functionality months ago and also mentioned recently was the Dongle, STB and Xbox Slim. DVR functionality will probably not be released till Vidipath tuners and or those alternate viewing platforms are released. This on-hold announcement likely means no dongle and STB will be announced at E3.
17) Microsoft is rumored to announce Xbox dongles, Xbox STBs and a Xbox Slim this year and Scorpio late 2017. This is a complete spread of STBs to be supported by the XB1 as a Media and Game Hub. Always planned and now near enough to HEVC broadband and Antenna TV support for an announcement. This plus NEO is I think why Sony believes they will sell 20 million PS4 consoles from Christmas season 2016 to March 2017. UHD blu-ray with digital bridge and Vidipath along with it being a media hub and DVR for other platforms and a Next generation TV platform.
A USB tuner in 2012 would have had a significant life but mid 2016 and it will be trashed within 9 months at the latest when Vidipath ATSC 1.0 and 3.0 antenna TV tuners are released.
DVR in the XB1 is on hold,
UHD Firmware update on hold since Jan 2016 (XB1 and PS4),
Vidipath on hold since June 2015. (CE Industry)
FCC DSTAC downloadable security scheme will become a mandate in slightly more than a year.
Cable TV is moving to all IPTV delivery now with Cable TV provided apps. The FCC mandate will require Cable TV to allow manufacturers to provide the APP using the Downloadable Security scheme.
ATSC 1.0 & 3.0 Vidipath Tuners should be shipping in 2017 (LG has a prototype)
DVB T2 using HEVC will start in Germany 2017 (Very close cousin to ATSC 3.0)
ATSC 3.0 will be first in Korea late 2017 but planned Antenna TV Broadcast of the Olympics Feb 2018
The FCC has been petitioned to allow voluntary early deployment of ATSC 3.0
The Yukon (2010) leak had it supporting DVR, Microsoft Playready ND whitepapers have it supporting DVR (Client and server) and Thurrott stated it will support a DVR now on hold not canceled.
Yes this is speculation on my part based on what I have read and posted above. I also had two other possibles in my last post.