While its true that it appeared that there were less defects on the old Canvas, LV has also gotten A LOT more popular in the last 5 years especially. We are also in a time with Youtube, Instagram, and of course, this forum. I don't think percentage wise they have a tremendous influx of defects, it just that any defects they do happen to have are magnified and spread much quicker nowadays. People who have pieces made in the last 5 years, like me, don't tend to make many posts on how their pieces are defect-free. On the flip side, we do post the potential defects and issues more often, mostly to see if others have the same problem/advice, etc. This can leave an impression that their quality is spiraling out of control. Not necessarily true. It is true, however, that there are more defects in the number of units because they are making more pieces, but I doubt the percentage is that much higher.
I still stand by my claim that the older canvas is superior. The reason I do is because I NEVER see anyone complaining about these current 'issues' with the canvas such as bubbling, peeling, etc. with the older (more than 10 years old and before) than they do with these newer canvases.
There are even people who pull out their older bags (sometimes more than 20 years old) and compare that canvas to the present day canvas and admit that the older is superior because it's thicker and they've never had any problems. I'm sure if there were those out there that have owned LV for more than 20+ years they would be happy to chime in here if they've had problems with their older bags.....you just very rarely see that.
Not to say that it never happens, it's just pretty rare.