Cyberpunk 2077 has reached many reviewers who posted their findings by now but it may be possible the copy consumers get will have fewer bugs and superior performance.
CD Projekt Red are seeing negative feedback from the fans two days ahead of Cyberpunk 2077 launch as several reviewers reported a massive amount of bugs and pretty bad performance and stability. It didn't help the fans' worries that The Witcher 3 went through a similar journey or that reviewers were not allowed to capture and use their own footage or even review the game on consoles at all.
Most of the complaints seem to boil down to two things - bugs and performance/stability. In the case of bugs, CDPR claims that Day 1 patch will fix " a bunch of issues reviewers encountered " on top of "some more" that are part of the update. And yes, this means the reviewers did not play on the build the consumers will get.
The same dev also claims Cyberpunk 2077 will be " a different game with console update ", referring to a question about stability on consoles. Now it only remains to be seen whether this holds up when the game is released.
One might question just how much a single patch can change but it appears that we will feel the performance change in the consumer version. According to the testing done by Tom's Hardware , the performance is just not good but GamersNexus chimed in to explain what might be realistic expectations on release.
Namely, the reviewer copies have DRM in them that affects the performance negatively. Before grabbing any torches or pitchforks, we need to clear that one thing up - CDPR will not enforce DRM in their games. DRM in reviewer copies exists to prevent leaks, probably the aforementioned footage that reviewers are not allowed to capture.
With that in mind, consumer copies will not have any DRM on GOG. It remains to be seen what kind of performance we will get at launch but it's highly likely to be better than what the reviewers encountered.
In short, CP2077 copies reviewers played on are apparently inferior to what we will get in consumer copies. That doesn't make sense on the marketing side as everyone wants good reviews but it is what it is for now. Last-gen consoles will undoubtedly struggle to keep up with more powerful hardware though.