The game is still being worked on, and it's likely to see updates in the future for a time yet. (Even when the studio announced officially that "work on The Witcher 3 was concluded"...we continued to see a string of patches, then a next-gen update, then even more patches.)
But, now, reality check. There will always be issues with games (all games -- every, single one) regardless of how many patches they receive. This is due to the nature of computer technology on planet Earth:
1.) Not all bugs can be re-created. If they can't be, then the source of the bug cannot be found. And when you're talking a player base numbering 10 million+ across multiple platforms, than means that even 10,000 people reporting an issue accounts for only 0.1% of player base. That's how rare such issues can be. Of course, efforts will be made to sort it out, and sometimes the bug can be fixed. But other times, it's like trying to track down one needle in a field of haystacks. Chances are, it will never be found.
2.) Certain bugs are the result of changes made to operating systems, driver updates, updates to APIs like DirectX or Vulkan, console OS updates, etc. These are not something a studio can affect. It may require players to, for example, roll back drivers to better function: this will be very common if running the game on older-generation hardware -- very often older drivers will work better. Fortunately, this is becoming less of an issue as backwards compatibility is taken into account much more nowadays by Microsoft, Sony, Nintendo, Nvidia, AMD, etc.
3.) Bugs are a result of modded playthroughs. There is nothing that can be done if players have modified the game in some way. A studio cannot account for the endless myriad of issues that can arise from this or that mod or combination of mods. Modding is always done at the player's own risk.
4.) Many "bugs" are actually the result of unique situations that arise when the game is updated multiple times over a single playthrough. If you're seeing something completely weird that doesn't seem to be a known issue, it's a good idea to revert to an earlier save or simply start a new playthrough. (This normally affects players that have been on the same playthrough for 3+ updates.) It can simply create exclusive scenarios in the game based on way too many potential factors to ever sift through.
5.) Yet other "bugs" are something on that person's system. Conflicting hardware, file system table issues, corrupted installations, hard drives / SSDs that are too full, aggressive anti-virus programs interfering with the game, botched drivers, faulty RAM, etc. This is especially true of people that are unable to reliably start the game, or experience random performance issues or crashing while playing.
6.) And then there are the catch-22 issues, where fixing one bug would knowingly create a chain reaction that causes another bug. Those situations are now impossible to fix, and the decision needs to be made as to which bug will stay in the game.
^ Any and all of those are the reality at any time. YEARS of work have been done and will continue to be done to make the game as stable as possible, but there will always be sneaky bugs and new issues cropping up as time goes on. Guaranteed. For every game under the sun. The more complex the game, the more issues will be seen. (Just remember that simply because you, personally, are not seeing any issues with a given game, it doesn't mean that they're not there. It's just that you're fortunate enough not to have encountered them -- or more pointedly -- didn't notice them when they occurred.)
Lastly, modders, while many do excellent work, are often not equipped to "fix" anything. Many of the mods that claim to "fix" things are either causing other issues in the game somewhere, unbeknownst to the author, or they're simply altering a facet of the game that certain players dislike. Meaning, there's no bug, some players just want it to be different. Totally separate considerations.
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So, yes, if you encounter a bug, can reliably recreate the issue (listing the steps), and are playing a 100% vanilla copy of the game that has never been modded, do send a ticket into CDPR Support. If an issue can be fixed, the team will help you fix it. Just be aware that some issues will continue to be mysteries. It's the nature of huge, sprawling RPGs with wildly detailed worlds spread out over 1,000,000+ lines of code.
